I have a Tekken 5 Anniversary Edition Stick that works for both PS2 and PS3. For the PS3, you just need a simple PS2-USB adapter which is what I have been doing. I’ll also include a PS2-USB adapter if anybody wants it. However, you’ll have to beef up your offer just a bit. (PS2-USB Adapters are usually $15-20 new)
I don’t need it anymore because my friends all have arcade sticks whenever we get together, so I’m willing to trade it off now. I have only used it a handful of times, and there doesn’t seem to be any damage anywhere on it.
Also have a Max Media Player for the DS that can play any rom. Comes with two 1GB cards and I’ll put games on it if you want. $35 shipped in the US!