I finally got hold of an EP-11 eyecup for the OM-D. [Had to order it from Hong Kong]. Well, it does the job, however as a wearer of glasses it doesn't really work well for me, as I can't get my eye close enough to see all the frame with my glasses on. (I can see all with the regular OM-D rubber eye piece). I tried it with the bare eyeball and it is fine, though of course I have to remove my specs and adjust the diopter.
If anyone in the UK is looking for an EP-11, let me know. I paid £22.98 for it.
Yours for £22 PayPal posted.
All the best