Is this magazine you are looking for from a conversion kit? As far as I know MRI never made a baby in 22lr.
But you may be able to use a conversion kit from an EAA Witness since they're of similar lineage from the CZ-75 albeit a modified clone. That's where I would start looking anyway.
I found something from J&G (but I bet you could find it for less money elsewhere).
EAA WITNESS 22LR 10RD MAGAZINE, POLYMER
I hope this helps, good luck.
But you may be able to use a conversion kit from an EAA Witness since they're of similar lineage from the CZ-75 albeit a modified clone. That's where I would start looking anyway.
I found something from J&G (but I bet you could find it for less money elsewhere).
EAA WITNESS 22LR 10RD MAGAZINE, POLYMER
I hope this helps, good luck.