does any one know of anywhere i can find after marketparts for my mk3 supra i really need to find some.

What engine, 7m, gte? or 1jz?

Seriously, you're going to have to be more specific than that if you expect any help. Try the most obvious sites first though,
www.suprasport.com
www.ebaymotors.com
www.935motorsports.com

7mge but i want to make it a gte and also new crank shaft new cams valves new piston head new rods and a bunch of other stuff for perdormance and then a little bit of dress up any one know of any places online i can order from