I've taken apart a few old cameras and lenses and saved the screws, and fortunately found some that fit
Mine is the original type with no screws in the bayonet. The focusing ring is in one piece and held on by three screws. A tiny setscrew was missing from the ring beneath that, causing the whole assembly to be a bit loose. Replacing that, and the one missing from the focusing right, and tightening everything up, seems to have helped. Otherwise it seemed pretty similar to yours.
There are some screws in the base plate of a Minolta X700 that are the right size for a Nikon bayonet, if you don't mind that they have a cross head.