After searching for a few days I finally found a pair of scope rings to fit my Chuckster. If anyone else needs a set here are the details.
Havlinsales.com
Item: 274m
$38 + $4 s&h
NEW! Mossberg 22 scope base for grooved receivers!
Here's the solution for those hard to scope Mossbergs from 1949-1986. Matte Black pair of offset rings for Mossberg 22's with grooved receivers, 140, 142, 144, 146, 151, 152, 250, 340, 341, 342, 344, 346, 350, 351, 352, 353, 377, 380, 640 all variants. Rear ring cantilevers back for proper eye relief with small mounting footprint, allows you to mount a modern 1" scope properly. Shown on Mossberg Model 341.
Offset dovetail scop rings
https://imgur.com/gallery/4BcGz5B
