looking for a performance chip for my 2008 scion tc... looked around and havent found anything can anyone help me out with a site or anything that relates...!!

Nope because they do not make one and if they make a knock off that would void warranty.

it does not exist hello

^^^ they do exist..its a ECU offered by AEM, GReddy.
but getting them is not worth it..because they cost like $300-900 and w/ a good tune u will have about 12 hp.
here is a link:
http://dezod.com/cat_electronics3.cfm
but u can get catback exhaust, headers, CA l and make about 20-30 hp. and NST light weight pulley kit gives u 12hp.

good luck