How to do wiring to generate quadrature encoder signal in Mesa 7i95 board

Could you suggest any Mesa board that can connect to my Mesa 7i95 and provide analog input support?This is urgent for my project, and I need to finish it as soon as possible. I cannot wait for the 7i87 to come back in stock.Thanks.

What is the required analog  input range, speed and resolution?

I need to control the feed override of the linear stage. Range is -10 volt to +10 volt. I want to keep 0 volt for 100 % feed override while -10 for 0 % override and +10 for 200 feed override. Resolution can be as good as possible, for now I can go with 0.001 Volt. This can be achieved if there is analog voltage input pin available in Mesa board. In my case I don't have analog pin in mesa 7i95 board. So, I planned to use 1 free encoder pin out of 6 in board. I also need to program in my Arduino or LabVIEW such that I can send fix number of pwm pulse to get the correct encoder count and map it successfully to +/- 10 Volt. Once it mapped correctly i want to bind the pulse count pin with feed override pin.

Please suggest how to do it the,  I'm looking for more than one approach to do the same and implement the simplest one. Because Mesa 7i87  board is not available in stock, so I'm looking for any similar board that can do my job.

Thanks.

If you have an external device that does the A-D,
and it  can output a frequency proportional
to analog voltage, you can read that frequency
directly with an encoder input (set to counter mode
instead of quadrature mode)

I assume that LinuxCNC and LabView are not running on the same PC?

Is this conventional LabView or LabView Realtime? (if that even still exists).
(As an irrelevant aside, until last year LabView RT was the only thing that I had actually been paid to program in)

Have you considered not using the NI card for linuxcnc control, but instead communicating with LinuxCNC using linuxcncrsh?
linuxcnc.org/docs/stable/html/man/man1/linuxcncrsh.1.html