Replacement switches for Musicalfidelity B1

[wurzel42]

I have a Musical Fidelity Amp B1, which works but it's rotary switches (and the MM/MC switch) are pretty noisy and don't make good contact. I already tried to clean them with t6 spray, but I still get crackling. How do I go about finding replacements? Mouser has millions of switches, and I don't know how to filter for this specific switch. The rotary switches have 6 positions but they translate the rotation into a sliding motion. It would make sense to try and get the exact same switches. Else I could mount a standard 6 position stereo rotary switch to the case and run wires to the place where the current switch is. Probably terrible for hifi enthusiasts...