I hope this is helpful, rather than a hijack, but I have a 1993 XC500, which I haven't used because when it came to me (with a 1994 Kona Explosif) the (removable) crown had a huge crack in it. But the lowers seem to be fine. i.e., I think you could combine the two forks very easily to make one good one, and for less than the cost of servicing the XCR.
It makes quite a good retro fork - it is short enough to work well with the geometry of retro frames and it works ok and mine weighs 1.47kg = 3.25lb.