WTB: Naomi Cart

[otoko]

I just picked up a Naomi based machine and I'd like to get a least one cart that uses a standard joystick and three or six button CPO configuration. I'm looking to pick it up as cheap as possible. It has US bios. Six button is preferred.

I'm not concerned what game it is but I'd prefer to get any of these:

Power Stone
Power Stone 2
virtua tennis
Spawn