I have a 3d printer. Sounds like a fun project and it would be easy to model up if you got me dimensions. Unfortunately, I think I can only got up to 5" diameter max. Price plus shipping would be nowhere near 70 bucks though. If you're interested shoot me a PM.
I did print out a pulley that I bolted to my water pump on the Metro. It was for an electric water pump conversion. I never drove the water pump with the motor though as I'm getting rid of the Metro hopefully this weekend. I to was worried about it holding up to the heat too. But, The pulley was removed not too long ago as I de-moded the car. It held up just fine. I plan on doing something similar with the Insight which is replacing the Metro. Here is the thread and a few pictures.
http://ecomodder.com/forum/showthrea...eap-29896.html