Here is what I did for a cable… Cable looks a little rough, but it works fine.
Here is the ones I bought…
MIDI/JOYSTICK/GAMEPORT EXTENSION CABLE 6FT NIB ~ADEAL~ - eBay (item 380307667434 end time Apr-13-11 08:54:23 PDT)
Here is the cable before I modded it
Shaved down one next to the stock one.
Next to Neo Geo Stock cable.
and if your going to go this route I would buy your cables sooner then later… Took me like 6 months to find a classic gameport cable like these, and everyone is over charging for a stock Neo Geo cable.
Oh yeah and here is my Neo Geo Custom…
The wood case is a QCF by Satek… got it off Luckyday.