Rubber eye piece lost again!!!

I am looking for the part # for the rubber eye piece that goes on the EP-EX15 extender. I checked B&H, Canoga and Ritz and no luck. I must be looking for the wrong thing. Thanks for your help

Gib

Right as I read this I said "how can you be daft enough to lose that?" Low and behond I have no clue where mine is, I just took the one off my t50 and slapped it on fits fine, Just a thought.

Mine has popped off several times, mostly in my backpack. My parts sheet lists the part as "Eyecup EF."

Da Roach

You can make eyecups stay on by effectively glueing them with a little silicon sealant.Any auto parts store has it.
It is harmless to plastic ,rubber,camera finnishes,etc and the part can be removed easily when you don't want it there anymore.
Just rub any residue with a rag and it peels right off.
It comes in many colours too