walther ppk/s parts

Ok I have a mystery that needs solving. My father-in-law passed along this magazine to me. I assumed it was a PPK/PPS mag. It seems to have wear on the bottom of it, leading me to also believe it was for a heel mag release version? Any help would be greatly appreciated!

I broke mine yesterday. Suuuuuuper bummed. Nobody on Internet has one!! I am hoping somebody on here has one, or a good lead on one! Any help would be greatly appreciated!