Recommended uk shaper - Matt Barrow, Newquay.
I think you should not use the exact old shape, but get a modern one based on the old one. Have a chat to Matt who is a really nice guy and go to see him with your current board and he will probably lend you one of his boards to try out to see if you get on with it. He will be able to shape you a great board.
I have used one of his boards and it rocked. I had already ordered a couple from Lost or I would have got one of Matt's boards. Next board I get will be a Matt Barrow.
His shop is Factory 52, Newquay (
http://www.factory52.com/store/) and he has a factory in Devon I think.