JB Yacht Services in Sarisbury Green. Sorry I haven't got the number to hand but I can give it to you if you can't find it. Several on here recommended them to me and I had complete covers and windscreen cover made. Very happy with the quality and price was very competitive. But be warned - Jim is a very busy man so you may have join the queue......
I'm berthed on Hayling if you wanted to look at them.