Fake Senheisser CX-300 from eBay?

i just bought these headphones from ebay and they say that they're genuine, but i don't believe it. i can get a refund, but there's no way of me telling that they are fake. i found this guide on iaudiophile on how to tell they're fake, and they look completely real from outside tests, but i dont believe that the speakers inside are genuine senheisser speakers and i contacted senheisser and they told me that the ones i bought from ebay are fake ( a copy made in hong kong ). here's the link:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=110165212046&ssPageName=STRK:MEWN:IT&ih=001

okay, now basically, before i return these for a refund, i wanna know if there is any STORE in Canada where I can buy the headphones just to compare them to my current ones to see if they're alike or better then the ones i have... so i can return mine for a full refund.

any ideas on what I should do or where i can purchase them from a store in Canada to compare to my current headphones to see if they're right or not.