ISO brake parts

[jrd]

Hi all. I have a '90 Rx7 convertible. Love the car, but parts are getting scarce.

I'd like to keep this car on the road as long as possible, so I've been trying to stock up on things which I expect to need. I had a problem a while back with the rear brake calipers sticking. These parts appear to be made of unobtanium. Summit Racing found me a rebuilt passenger side unit, but still no driver's side.

Any pointers to good sources of these parts would be much appreciated. Even (maybe especially) boneyards. I'm happy to get things rebuilt, or do it myself, but I need to start with a core.

Thanks in advance . . .