The guy who does the trigger refurb packs ($15) runs Classicade (
www.classicade.com, I think). His contact info should be available there.
The trigger refurbs would replace the red thumb button you still have on the right handle. The ones that concern me are the index finger triggers on the front. I have no idea where you would get these -- this is why people who refurb these things often end up getting more than one.. for spare parts. And -- for reference -- the Happ trigger stick triggers don't work for this, either.
As for your pedal assembly, it probably uses potentiometers. Once again you have a variety of hacking options (Dual Strike [for USB], wire straight to gameport as a 1-axis device, other analog sticks, etc.), but hacking a Dual Strike is probably best if the pots are 5K single turn type -- this way you don't have to buy new pots. Your pedals could also be a switch type -- in which case you can wire it directly to an I-Pac -- or even optical. I just
doubt it's optical.
Good luck.. had me a Road Blasters panel and ended up getting 1 handle off it and trashing the rest

(no sin on my part, it was so rusted together I couldn't disassemble it anyways.. hell, I had to saw the handle off.. don't ask

)