Need 9mm ejector for Peters Stahl PSP -7 Multicaliber 9x19 pistol

[warnerwh]

I have a friend overseas with the Peters Stahl PSP -7 Multicaliber 9x19 pistol. He needs an ejector for shooting the 9mm. Apparently it can be changed from 9mm to .45 and back again. I know nothing about this gun. I can send a picture if it's needed. Any help would be appreciated. Thank You