I purchased mine a few years ago for my PO-1. I see them come up from time to time on gun brokers web sites.
Just keep looking and you will find one, they are out there.
You will really like it when get it. If you go to the Kadet Kit part of this forum, you will see a Upsula Mag loader
which you can purchase from a member, that will make you mag loading life MUCH easier with the .22's.
Richard