Between Nikon #2939 and Canon AE-1/AT-1 eyecups, which one fit fz20 better?

Will this eyecup fit fz20?
http://cgi.ebay.co.uk/ws/eBayISAPI.d...sPageName=WD1V
The eyecup is for AE-1/AT-1 but looks different from the suggested model.

Where can I get the eyecup in UK? I loooked at a few shops but none of them have the suggested models.

Thanks.