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This is a stab in the dark as i do not have a 7i96S (did have 7i96) but inputs should be with something like "inmux" in the naming, sorry been a long time since i did a 7i95 that had something similar in the pin naming.

While you wait for PCW to confirm when the 8i20 might be in stock:
You can use other drives to drive motors and still use the existing resolvers, but no idea what exactly would work for you, probably any "voltage mode" drive, and maybe "torque mode" will also work, but you should wait for someone else to chime in and confirm any of this.
I am sure LinuxCNC will work with any setup, not sure about cheap drives plastering all possible options on the label and later finding out they do only step/dir or only +-10V...although some +-10V should work if they do not explicitly require having a tacho attached.
This would mean using a Mesa 7i97T together with 7i49.
In the meantime some more info might help narrow things down, like motor voltage/current/power, resolver type/make/model (very important as i have resolvers that do not work with 7i49, yes i am unlucky as heck), brakes, tacho maybe, etc.

By providing detailed technical specifications for your servo amplifier and motor, you’ll significantly improve your chances of receiving an accurate answer.

Yes, the networking part, we were misled badly and chased our tails by having the laptop wired to the console while the network required for file transfers was at the back of the main electronics cabinet! That is 6 hours i will never get back! I kept wondering why W2K has an IP set and the Mazak software has another IP set...now i know.
So now it can be used properly with the laptop, but i would still like to be able to use it without the laptop attached since i already figured out how to copy stuff to it, so i will report the exact model when they get back from Germany in a few days.
Thank you very much for everything.

Is there a repository that currently is complete and works? I have been trying to get an installation working since March with no luck at all. I continually get errors about various components (LCEC, Boost, meson, etc) I have been able to get an "install" using the repository on this thread but it seems to lack full connection to the before mentioned components

Did you solve your problems with this machine?

Thank you, but I have already changed the plasmac component and got the result I wanted. I added a few lines:
   self.extJogXplusPin = self.h.newpin('ext_jog_x_plus', hal.HAL_BIT, hal.HAL_IN)
   self.extJogXminusPin = self.h.newpin('ext_jog_x_minus', hal.HAL_BIT, hal.HAL_IN)
   self.extJogYplusPin = self.h.newpin('ext_jog_y_plus', hal.HAL_BIT, hal.HAL_IN)
   self.extJogYminusPin = self.h.newpin('ext_jog_y_minus', hal.HAL_BIT, hal.HAL_IN)
   self.extJogZplusPin = self.h.newpin('ext_jog_z_plus', hal.HAL_BIT, hal.HAL_IN)
   self.extJogZminusPin = self.h.newpin('ext_jog_z_minus', hal.HAL_BIT, hal.HAL_IN)

   self.extJogXplusPin.value_changed.connect(lambda v: self.gui_button_jog(1 if v else 0, 'x', 1))
   self.extJogXminusPin.value_changed.connect(lambda v: self.gui_button_jog(1 if v else 0, 'x', -1))
   self.extJogYplusPin.value_changed.connect(lambda v: self.gui_button_jog(1 if v else 0, 'y', 1))
   self.extJogYminusPin.value_changed.connect(lambda v: self.gui_button_jog(1 if v else 0, 'y', -1))
   self.extJogZplusPin.value_changed.connect(lambda v: self.gui_button_jog(1 if v else 0, 'z', 1))
   self.extJogZminusPin.value_changed.connect(lambda v: self.gui_button_jog(1 if v else 0, 'z', -1))
It works great. 

At work we have a robot with a dead servo drive. The manufacturer is still around, and says that the original drives aren't available by any means. As far as I can tell, the motors are ordinary 3 phase brushless servos, but with resolvers. I can't find any industrial servo drives or systems that use resolvers. A few manufacturers list drives that can take input from a resolver, but of course they all say "call for quote" before I can get any information on the device.

I'm aware of the Mesa 7I49 resolver interface board, and the 8I20 PWM amplifier (which is out of stock). Are there any other industrial servo amplifiers that work like the 8I20?

This is a professional application: I am not going to screw around designing boards, nor will I consider hobby-grade hardware. I'd like the next person who needs to work on this machine to be able to do so.