Actually, the first sticky on our induction page features a senior member using an Ebay-sourced kit with great results.
http://www.318ti.org/forum/showthread.php?t=27092 I do know he did not end up using a turbo from ebay, but almost everything else (manifolds, piping, wastegate, BOV, intercooler) was sourced through the previously listed seller.
His thread is extremely helpful but because the photos he took are no longer hosted, I can't really "get the picture" through text alone.
I will PM him as soon as I've reached my post requirements. In the mean time, anyone else that has used this kit, please let me know how it worked for you. Thanks