Need help with BF MKiii wagon roof bars

I bought a BF MKiii wagon approx 2 months back. It came with genuine Ford roof bars but the owner had lost the keys. I've been to a locksmith and he said without knowing what the key blank looks like it will be very difficult to get into. Could anyone provide me with a photo of their key?

Have you tried to find out who was the original selling dealer? They may be able to help?
Or, it may have been installed at the factory? ( not likely but, you never know)