Here is a brand new rubber eye cup for your Konica Autoreflex camera. This product was discontinued many many years ago. I just happen to have some old stock.
Once they're gone they're gone forever.
It will fit all the Konica Autoreflex cameras with a 18mm round threaded viewfinder hole, they are all the same size. I believe the complete list of cameras are the A, T, T2, and T3 but there might be a few more that I have not identified.
I really like having one on my camera. My favorite thing is that it makes the viewfinder readout easy to see even on a bright and sunny day. The metal piece slips onto the eyepiece of your camera. Prevents unwanted light from effecting your judgment of the image you are producing. Also prevents eyeglass lenses from getting scratched. Makes shooting more comfortable. I like this kind better than the original manufacturers because they are bigger, covering your whole eye socket.
The rubber portion can be taken off or slipped around the ring to accommodate either the right or left eye. If you use a round drop in correction lens there is a space and retaining ring to hold them.