So you're the one! Why should I help you find an eyepiece when you beat me out on that Hexar while I was wasting time googling for a replacement?
🙂
I think you got a good deal if it is as described. From what I read the Hexar RF also had a problem with them coming off, but it was worse because the view was blurry without it. You just have to deal with the cosmetic and dust issues.
I didn't really come up with anything definite on my initial search, except that original parts are rare if not nonexistent. But I think you have a decent shot at finding a clear eyepiece that fits. Could it be the same size as Nikon circular diopter lens, which I think also fit the R-D1? A Megaperls magnifier maybe, which unscrews to allow diopter lenses? The threads (are there threads?) must match also of course. See this thread including photos:
http://www.rangefinderforum.com/forums/showthread.php?p=317306
Would the rear most piece of the Megaperl possibly fit?
http://www.unicircuits.com/shop/product_info.php?manufacturers_id=15&products_id=112
[EDIT] I now see they also sell an adapter so the magnifier (pictured below) fits the Hexar RF. They say the adapter "slips" in, doesn't screw in, so maybe you don't have threads either. Maybe that will fit the AF, but the adapter probably doesn't have glass. They don't have a photo.
If the end piece (with glass?) of the Megaperls magnifier screws into the RF adapter, and the RF adapter fits the Hexar AF, then you are good to go, for $122.00. Wouldn't that be cool? I would contact them if I were you.
http://www.unicircuits.com/shop/product_info.php?products_id=139
I'm posting a pic of your camera (small world huh?
🙂) so others more knowledgeable than I can heip.
Try to find the correct measurement and when you find one you'll feel great about fixing it yourself and the price you paid.
All is forgiven as I lucked into another "buy it now" yesterday morning. I'm happy because it is a black original, but comes with the later model silver Hexar slip on cap, which I prefer.
I think we both did well as the prices of these things are high at the moment, at least on the auction site.
Good luck.