I have just had my caravan awning repaired by a company in Port Glasgow, when I went to collect it they had some canvas hoods from LR's sitting in the workshop which were being repaired. They did a very good job on mine and they specialise in boat canopies, sails etc.
They are called Covertech and as I say are in Port Glasgow not sure how far that is from you. They are listed in the phone book on line
Tommy