rd200mike

I looking at what caliper I could fit to my RD200 project, and wondered if I could use an alternative than the original (and rare) caliper? Any ideas?

Hello, new guy here. I've got an RD200DX with the caliper in front of the fork leg. I want to fit a later year RD200 front end with the caliper behind the leg. I'm not bothered too much about being 100% original so would look at fitting a different caliper if I can't find the correct one. What I'd like to know is whether I can fit a caliper from a different model of bike without too much fuss? I don't want to start welding new lugs on to the fork legs etc.. I thought maybe one off an old XS? Cheers, Mike