From where can I get a set of scope bases for my BSA Martini International cal.22 lr ?

The T/C Encore base fits pretty well on the International, though when I used one on a Cadet of mine I did bed it so that it would be a perfect fit.
Jansa arms and Jemtrek interprises sell a side mount that can be put on the frame (after tapping), but I really don't like those very well. Mike Wilkerson presently has a 12/15 of mine that he cut to 24" and fit a Weaver blank to. (He also rechambered it to 22mag. for me) If you don't want to do it yourself, you could contact him. He hangs around over on the "Go Go Varmint Go Message Board"

T.D.

i drill and tap it to use the brownells universal .22 dovetail base.

Thank you for your suggestions.
I ordered today a 10" Weaver style rail which can be installed on top of the existing blocks (8" from each other).

This seems the easiest and cheapest solution to me.