I think the manual 80/4 should fit. It's a superb lens, floating element with lots of extension. It won't disappoint. I have one and like it so much that I sometimes use it via an adapter on my 35mm cameras.
Now about adapters... you can mount just about *any* lens on there for macro with one of my patented, I-need-it-right-now / ghetto adapters. You take the rear lens cap for the lens you want to put on, and the body cap for the mamiya, put them back to back and glue them together. Then drill through the combo after they've dried together. Presto. Mamiya-to-anything adapter Put a fast 35mm macro lens on there! Go nuts!