Simplex Prestige Pulley?
 

I have an 1970s Atala that I'm trying to bring back to life. The Simplex rear derailleur has a shredded tension pulley. If it were to match the pulley above it, it would be 10-tooth. Is there an aftermarket substitute, or am I looking for a Simplex pulley?

I'd prefer not to pay eBay prices for this one part. Thanks for your insights. Phil

Is $45 for a pair too much! :-O More than I'd want to pay....
http://vintagenosbicycleparts.com/sh...illeur-pulleys

I've used pulleys from old Shimano derailleurs on two different Simplex shifters and it's worked well. Just make sure to match width as much as possible.

You can pick up a set of good used or NOS Suntour pulleys fairly cheap and they a pretty good match and work fine if you replace both pulleys.