Whilst on hols in Spain I managed to catch a tree whilst siting the van. Basically a branch squashed the awning rail shut. I managed to open up the awning slot - it was closed all along the top but the rubber beading is torn over a length of about a foot. I assume that this is a rubber section that sits beneath the aluminium extrusion and to change it I will have to take the whole rail off. Two Q's; where would I get a new length from and could I just fill with sealant instead?