I'm sure there are some TRD suspension parts for the mk3. What, I don't know, maybe someone else will be able to chime in with some info.
As for sway bars, check the vendors on here. I'm still waiting to test the ST bars and run some more numbers before I post up my recommendations on what sway bars to run with what spring setups, so if you wait a little, you will be able to make a much better decision.
Tim