Looking for a collaborator(s)

I'm trying to design a couple old pieces of avionics. The first is a Narco MK 12 (C I think) NAV/COM. I have done the graphics and now am working on the XML code. I'm by no means an XML expert but I am conversant with programming having made my living for many years programming complex test equipment to test integrated circuits at various companies in San Jose, San Diego and Phoenix. But I digress, I'm working on the Narco XML using other xml radios as a guide. It is going slow due to switching between FS Panel and Fs2004 to debug.The second unit is a Foster 511 RNAV, which I have also got the graphics done, but I haven't a clue where to start the XML. I think I can get the switches/dials coded but how to integrate it into fs2004 so that it actually moves the VOR to a bearing and distance as input by the thumb wheel switch input is a complete mystery. The only RNAV unit I can find is a Narco designed by David Newby Associates as crippleware/payware in 2000 . Newby apparently is no longer supporting his product, having appeared to gone on to the environmental business. Attempts to contact him were fruitless.The goal of all this is to reproduce the panel on the C172 I owned in the 80's. I could use some (actually a lot) of help and if I/we can get it working will post it for public use.David