Uberia Supergun 6 button help

I have a Uberia supergun (http://www.stalemeat.net/) and need a modded joypad to play 6 button CPS2 games, but since uberia themselves don't seem to be responding to any emails I'm at a loose end on what to do. Does anyone know any other site that offers a simular modded 6 button pad, or diagrams on how to mod a pad which would work with the supergun (the joypad input is the same as the neogeo), or does anyone have a modded pad that they no longer need and willing to sell to me.

Depends on how your supergun is wired regarding the extra 3 buttons, if it doesn't have an auxiliary connector for the kick harness you'll need to install one in the supergun.

It may be a custom one that already has the connector, if not like amano said, pop it open and get soldering I guess.

well since mine is just a normal supergun from the site i posted in my first post it hasn't been modified to tailor for 6 button games at all. Is there any good sites I can go to, to find information on how to mod a joypad to work on CPS2 games?