>> for about 2 weeks now I've been seaching the web for a ST205
GT4 body kit. Ive seen a few but are there any parts store located in the
USA . For example C-One in the USA .

My next question. Does anybody knows if the other model hatch back celica body kits can fit on the ST-205 model GT4 celica?

no st205 specific bodykits are available in the us. although I have seen the zglide style kit fitted to a gt4 front, your probably better off ordering something from japan.