Taurus TX22 20rd Magazine

I really liked the versions already posted on Thingiverse but I didn't like how the mag body didn't seem to fix in place very well. The bottom plate didn't stay in position unless you glued it or used a super strong spring. It didn't leave me feeling like it was very secure or reliable. Or maybe I just didn't realize how it was supposed to be properly assembled. :)

At any rate, I decided to remix it and just insert a thin plate at the bottom and make it a straight 20 capacity magazine. It works well for this now.

For springs, you can use these same springs as for an AR15 22LR magazine and just cut them down a little.
https://www.blackdogmachinellc.net/ciener-replacement-recoil-spring.aspx

But the main thing is these dimensions:
0.370 OD .312 ID .022 DIAMETER APPROXIMATELY 50 COILS