Welcome to the forum.
This would be better in the semi-auto pistol area.
Look at www.e-gunparts.com
for another mag. They may have it.
Now does it have a Fail to Feed or Fail to Eject? When was the recoil spring last changed? Are you using standard velocity ammo? Does the manual call for high velocity ammo? Some .22 ammo can be the culprit and make you think that you are having gun problems.
Try a box of HV (not Stingers) and report back in the Semi Auto section.
"A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed."
Life Member NRA
Life Member NAHC
Former President of the ECPT (Eifel Combat Pistol Team)