Grooved rings for a 3/4 inch scope?

[Grouse Man]

There are lots of rings for 1” scopes to put on regular grooved rimfire receivers, but are there any 3/4” rings for a grooved mount? I’d like to put a Weaver G4 on an old Mossberg.

 

[9.3mauser]

Redfield made a good set, but you'll have to look on the 2nd hand market to find them.