I've been looking for a long time for a rail to fix my surrey top to the top of the windscreen . I know a few folk on here looking for the same stuff. Piddy used the rail on his seven. Well I've finally found a supplier that sells it and will post it as a few will not sell it separate from the awning. The company is called CNF Outdoors in Keyworth Nottinghamshire . The rail is a Fiamma awning rail. Hope this helps a few guys out
Andy

This is what i used, ebay search; Caravan / Motorhome ALUMINIUM AWNING RAIL

I used this rail on my old car it's not as good as the new rail I have as the fixings are not positioned in side the rail itself they are on a flat mounting plate so they don't foul the channel