I belong to a forum of guys who make model engines. There's a guy, Bill, making a 1/6 scale model of a Pratt&Whitney 1830 radial engine. He needs a turbine wheel to modify for the supercharger (rotrex style) on the original.

So, looking for an impeller: Garrett TO43/23 or 409179/23,24 or 25. Contact me if you've got one. Bill lives in Bristol, Connecticut. I'm in Rochester, NY.

 

I might have one from my old t3. I'd have to look next time at at parent's house.