step/gen on expansion ports on 7i76E

I have a machine with a Gecko G540 that I'm moving from parallel port control to the 7i76E (which I already have -- I know other cards are a better fit).

Is it possible to put the step/gen pins on expansion port 1 so that they match the pinout of the G540? It looks like this would require a custom bit file, but I haven't figured out if there is a master repository with a set of well known configurations.

Here is the pinout that I'd be looking for:
1: output 1
2: x step
3: x dir
4: y step
5: y dir
6: z step
7: z dir
8: a step
9: a dir
10: input 1
11: input 2
12: input 3
13: input 4
17: output 1
18-25: GND

I don't think there's a standard one but I can make one up
Do you want the first stepgens (0..3) on the G540?

Yes please, that would be great.

7I76E firmware with G540 connection on P1

stepgens 0..4 on P1 (stepgen 4 is for G540 chargepump)
stepgens 5..9 on 7I76E
1 PWMgen for G540 spindle
second encoder on G540 input pins

Thanks! I'm just waiting on my DB25 adapter for the 7i76 (should be here in a few days) and will give it a try. I've created the config and it looks like it'll do what I want. Hopefully this is useful to other G540/7i76E users too.