I've got a similar camera that's in OK condition. I had a take-up adapter made with flanges to accommodate 120 film, and a couple of spacers for the supply side (so I can load it with standard 120 film). Had I thought about it more I could have made adapters for the take-up side too.
Across the film gate, I made some new guide rails from brass stock to help keep the film flat(ish). I then made a mask for the autographic window with a little red-window cut-out (using cellophane) that uses the 6x6 numbers. I then worked out the number pattern to use (Can't remember exactly which.....I think it was a couple of "spots" before 1, 3, 5, 7, 9, 11)
And an image (nothing special) created with it: