Looking for a Collins 786V-1 Stereo Generator card for my 310Z-2 exciter.

[Opcom]

Asking here because there are BC engineers. Don't have anywhere else to ask.

I have a Collins 310Z-2 FM exciter. It's a great compliment to my part 15 AM station.

I'm looking for the 786V-1 Stereo Generator card for it.
As it is now, it can make only a mono signal.

Instead of the 786V-1 Stereo Generator, it has the 785E-1 STL Interface Card. That means I'm stuck with mono for my little indoors home broadcaster.

I'm sure that by attenuation and power reduction I can comply with FCC rules on Part 15 broadcasting. I'm close with a 30dB attenuator, 2 FT stiff wire antenna, and setting the power low on the exciter.

This will go with my AM broadcaster for listening also to my vintage FM/HiFi tuners.

Thanks for any assistance.