The "bellows" on the Panorams are much simpler than a typical folded bellows. They are mostly just a flat piece of leather with a hole for the lens.
I was thinking I could buy a small piece somewhere, I only need a piece that is 4 inches by 6 inches. Before I buy though, I will remove the existing bellows and fold it out flat to get actual dimensions and pattern.
The leather covering my wreck of a camera was flaking off in large pieces. I stripped off most of it. The cherry wood body underneath looks really nice. I will seal it with varnish after the cleanup. A nice black bellows from a nice premium peice of leather will add a nice touch. That, and polishing all of the hardware.
Sounds like a nice winter project.