Replacement eyecup for e30

I lost my eyecup - first time ever on my e30.  I wear glasses all the time.  Which of the EP5, EP6 or  EP7 is the best to get?  I can't discern any real differences between them on the Adorama site.

Thanks in advance

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Bob B
www.pbase.com/bbernstein
Olympus e30, e-510, 12~60, 50~200 ED, EC14, 18~180, 14~42, 40~150, 50mm macro, 9~18, fl36