From memory, didn't Milbro did their Diana Mod 27 based Targetmaster in 0.22 cal ? Possibly a "pick up and shoot" affordable item even if it lacks the charisma of other makes, and presumably one that secondhand spares would always be available for at any point in the future.

Just a suggestion, but I'll check the item out slow time using one of the various reference guides,

Vic Thompson.