I have a 12-32 that I have run successfully with both a Record and Chorus long cage RD. I thought I was Campy but just checked and indeed it's not…no idea who made it (arrived on my C40), the lock ring says "GIANG MALAYSIA MARS".
It's in decent shape, plenty of miles on it, and I'd be willing to let it go pretty cheap if you're looking for something to experiment with.
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