This is 18 months later, but may still be of interest to some. I recently chose a Sony AX53, after a long consideration, as being the best for my purposes. I also was unable to find a simple rubber eyecup that wasn't specifically intended for a particular camera. So I took a look at my old Canon L1 camcorder and found that its removable eyecup was perfect for the AX53. I experimented to find the best position, which I found was slightly tilted up and to the left on the EVF. I used some shoe-goo underneath, to lock it in place. So it is possible to browse around among many different brands of cameras and camcorders and find an eyecup that may work. A camera store that has lots of used equipment (if such a place still exists) might be a good place to look. Check out secondhand stores, such as Goodwill or St. Vincent de Paul's, as they may have some shelves with odd camera parts on them.In general I'm very happy with my AX53 but I do have problems tracking moving objects through the viewfinder, particularly in bright lighting conditions. I wear glasses so get light 'leakage' round the edges of the standard viewfinder which aggravates matters. I have been searching extensively, without success, for a larger flexible eyecup to fit the AX53 to solve this problem. Is there anything out there I can buy (preferably from the UK)?
Thanks in advance for any advice you can give.