Does anyone know of an adapter to put a Pentax 6x7 lens on a Hasselblad 200 or 2000 series camera? (Before anyone says you need a shutter in the lens, the 200 & 2000 Hasselblad cameras are focal plane shutter cameras). The Pentax 6x7 lens mount register is 84.95mm. The Hasselblad 200 & 2000 mount register is 74.90mm. That's about 10mm of spacing to spare. I've been searching eBay & Google with no luck. Thanks!