Why dont you just narrow down what you really wanted?
Shops dont like carrying too many range of photo frames
materials, for the simple reason that its not economical and it
takes up a lot of space.
For wooden frames, you can always change and dump out the
frames. Or have it specially framed at frames shops.
For metal wrought iron or even mirror frames, you need to do
some window shopping to get one at various little gift shop outlets
that should look unique to you.