in one of the other threads about insurance a poster mentioned that a company said the clubs had to be taken to a pro so he can give you a letter proving you owned the clubs.
Some had an issue with doing this but it would solve you're problem i think.
Look at the other posts to see what company it was, i cant remember.
Perhaps I should review my insurance - I'm with AG cos it was on offer but all I did was tell them what I had and cough up the reduced fee. Am I missing something??
(Shoulda mentioned, my Cobras are from last century!)