Flashback 9 HDMI-modded trak-ball controllers... can someone mod one to work with a FB9???

[BIGHMW]

Well, I hate to get greedy, but since we now have a successful eBay-er selling FB9-specific-modded paddle controllers, is someone willing to take on the task (for a fee) of modding either Atari (CX-22 or CX-80, like I own) or Wico 2600-compatible trak-balls to work with a Flashback 9 HDMI version???

 

Note that I am sure there are a few of us who have Centipede, Millipede, and/or Missile Command and want to play these great classics the way they were intended.... with a trak-ball!!! I have a CX-80 unit and would love to get it modded to work with mine, but who is willing to say "yes!" to the idea???