I'm getting ready to finish up the top end work (vales and rings) on the R60/5 and the one item that I've just found worn that aren't being replaced at this time are the rocker arms. Specifically, the tips of the rockers that contact the valve stems. They are all pitted or galled, slightly to moderately. I think they'll last a few thousand miles, but I'd better start thinking on repair. I suspect that "repair is by replacement"; since the tip is hardened, I don't think it can be welded and reshaped.
My /5 heads came as the early /6 style, and I was able to retrofit the "newer" early /6 needle-bearing rocker arms several years ago. The second item on Anton's Rocker Arm page:
Suggestions? New is horridly expensive, used is a pig-in-a-poke.