I think I mentioned to you that the amount of hacking you did on the Poly is almost like building a new synth. I see no reason for you to take this outside the Poly group and try and get a broader support for this idea - maybe even set it up on Kickstarter or similar. You could make a great video of your work already accompished by means of the Poly-mods.
Only thing which could be a problem - I imagine you want to use the poly's filter IC. When the stock of this part dries up you're out of business. I know a lot of SID-station project which are now pretty much at a dead end.