I think the bellows are from a Sinar Norma camera (that's how they were advertised on ebay).

They are too long though. As I need the front and rear standards to get close together to fold the camera up, I cut off about 1/2" (closed measurement) from the back and will now have to re-glue them back to the plate.

I have made bellows before but the reason I'm building this camera is that I bought the bellows for not much money.