I have a set of wheels for the supercharged guys that have no lips, and are convex, so the belt won't jump off, and destroy itself. It is very unique thing, that I bought off of the guy that used to make them, and sell them mainly in japan. anyway, come with extra replacement bearings. Never used. Paid 250, asking? 175?

pics to be added.

 

miataTURBO.net, does that ring a bell??? GLWS otherwise!

 

When I had my sebring charger, I used to carry spare belts in my trunk. These sound like a solution.

You will have alot more luck selling these on Miata.net or clubroadster.net.

People here either don't have superchargers or had one and ditched it for a turbo(like me).

Good luck.