@ Rothhammer1 -- Yes, that mount is the one I have.

@ Waidmannsheil -- Ring diameter was not the question. It was about ring availability, which I presume is minimal except from maybe a few knowledgeable people. I'll deal with the diameter of the rings when I find them. Presummably, scopes to fit rings are easier to find than rings to fit this mount. One inch dia. would be a good starting point for me, and appears likely to be the most common size. I am aware of other sizes, especially for larger scope objectives.

Thanks.