I'm trying to get an after market throttle bodie, mass air flow sensor and a cam for my 2002 ecotec does anyone know what site/place I can find these at?

if you have a 02 ecotec in a cavalier or sunfire, they do not come with mass air flow sensors, so i beleive you will have a very difficult time finding one aftermarket, unless you are running a standalone that works with a MAF, then you could retro fit pretty much any one.. the throttle body and cam can be found anywhere check the FAQ at the top of the page.