Buddy of mine who works as a graphic designer for GM happened to think of you turbo tour guys (he's c ontoru enthusiast and knows abotu Jim, Stazi, etc) when he came across the emblem for a Corvair Corsa.
Personally, you guys looking for a "turbo" emblem.. I think this would look pretty sick on the front grill.

Factory emblems are 2-3/8" across and can be picked up cheap (from what he said). I dunno.. just a thought for you guys.