Summit dose not have much for the imports.
Personaly, I would call around and go to some local cruse/car shows. Ask around.
Mabey even try calling a Toyota dealer....just to get pointed in the right direction.
A couple of manufactures I can think of are BROSPEED & MONZA.
I am sure that if you pick up a import car mag. that you will find all the bolt ons you are after.