Mamiya stuff at Shutterblade.
Mamiya stuff at Shutterblade.
The eBay seller Shutterblade used to carry a lot of Mamiya 645 cameras and accessories. I bought a lot from them and they were always reliable, and very accurate on condition and rating their items. It's been a while.
In addition they used to also be an excellent source for all the Bronica 645 camera's, parts and pieces.
One poster mentioned the next level of 645 Mamiyas.. the Super and the Pro.
If you desire to move up to the removable back bodies, I encourage you to skip over the Super. Bad electronics and a default to one shutter speed, the same as if the battery went dead. I had two go bad. I had about 5 of the Pro bodies and never a problem. The Super electronics problem was a widely known issue.
As mentioned, all the lenses you now have will work on the Pro, up to, but not including, the AFD (autofocus). Also the inserts you are using on the M645 1000 can be used in the removable backs for Pro.
Mac Group in the US still has parts and I believe service for the Mamiya 645 cameras.
The early M645's like you have are tanks and rarely develop issues. No chronic issues that I know of.
My last pieces of M645 stuff are two of the grips, and a unique 70mm Leaf shutter lens, so you can synch flash at any shutter speed. It requires a special double cable shutter release, which I do not have. Just more stuff to liquidate.