Hello, Someone gave me a n RICOH XR-7 a few years ago. The film advance arm keeps getting stuck and its to expensive to keep repairing. Along with the body I got a: 1. Auto Coligon lens 1:2.8 f-=28mm 2. Rikenon P 1:2 50mm 3. CPC Auto Zoom 80-200mm Can someone please let me know if any K-mount model will fit these lenses and if so which ones?