Try somebody like Collectable Cameras. They're listing 3 Zeiss Ikon folders that might suit you, just go right to the bottom of the linked page and you can see photos of them.
http://www.collectablecameras.com/cameralist.htm
See my post in the 'New Toy' thread, doesn't get much cheaper than that, £55 for a 645j, WLF and 120 back, 80mm lens jammed wide open at f2.8 but otherwise functional included as a body cap!
That was from eBay and just goes to show, there are still bargains to be had.