My KMV arrived as a real beater - missing parts including the 8X10 back. But I got lucky. Was alerted by Eliot and others of some KMV parts sales on ePrey.
Would suggest being on alert for a beater that you could combine to make a good one. The bellows, if has pinholes, can always be patched with liquid electricians tape ( I used nearly a whole jar of it to patch a bellows on a 100 yr old Korona 7X17).
New bellows are also available from Rudy on eBay (ecbuyonline).
For $189 you get excellent quality bellows, made to order.