Usually any rotational TPS available for any number of domestic and foreign models. There's a lot of possibilities out there and it really depends on your needs.
ask yourself the following:
- is there a specific rotation I need from the TPS (CCW or CW)
- is there a specific voltage or resistance range I need
- is there a specific price range I would like to keep within
- is there a particular failure mode with the TPS I want
There's obviously more to it than that, but those will point you in the right direction.