Back in the day, when we were issued revolvers, the department range had a collection of K frames in various states of disrepair. I was a range officer, but no armorer. I did, however, once help a real armorer disassemble a number of these revolvers for parts replacement and inspection. I tried changing sideplates on maybe half a dozen guns, as I was curious, having read they were hand fit. Results were a couple fit well, a couple fit, but poorly, and a couple not at all.
So, I would think most could be made to fit, but it is not guaranteed. It might be different on modern CNC made revolvers where tolerances are closer, and there is less hand fitting.
Larry