While I'm not a gunsmith, I have some experience fitting small parts. If you have the patients you can do somethings yourself. I I recut a set of Weaver steel high rings to mount a low power scope on a drilling. The drilling had high claw mounts, while suitable for hunting out of a blind they were totally useless for a fast handling still hunting rig. The new rings I made changed the whole dynamics of the gun more suitable for my hunting style.
Scope and new rings I recut, this was a long job, one stroke of the file, re-blacken, fit and another stroke of the file near the end.
Attachment 109855
It did turn out working well, group was at 100 yards (90 meters)
Attachment 109856
Original scope(6x48mm) on rifle, too high for quick mounting and good cheek-weld the scopes are interchangeable with no loss of zero.
Attachment 109857