somtimes, like 75% of the time the fan page owner will be the first person to become a fan. so just type in.
Code:
http://www.facebook.com/social_graph.php?node_id=XXXclass=FanManager
were 'XXX' is the fan page id then scroll to the end of the list.
this is a pretty annoying way to find the first fan member if the fan page has ALOT of members, and the first member might not turn out to be the page owner.
You could always look for parts of the page that arnt used that much to get the page owners attention.
i.e. if there isnt many threads in the discussion tab, create one saying you want to get in contact.
or
upload a photo to the fan page to try and get their attention to contact you.