WTB: 1981 compatible xs400 front brake caliper for disc

Heyo, first post, not sure if this is enough of an introduction. I just bought my first bike, a 1981 xs400, and the last thing I need for this thing to ride is a complete, working front brake caliper. I'm not really stoked on doing a conversion to a drum, I just want to ride and soon. Anyone looking to get rid of a caliper?

post up a picture i may have one