Instead of wasting your money on junk, check out Classy Pontiac's thread in the For Sale section. Look at the pictures... I havnt heard a single negative thing about his work, and Im expecting mine soon.
They're about double what the ebay ones cost... but that's because real projectors cost that much... junky ones are gunna be cheap, ofcourse. I'd definitely rather spend 20 bucks on something awesome and quality, versus 10 or even 5 dollars on garbage.
Check out www.theretrofitsource.com if you want to learn more and maybe do it yourself.