Ifyou don't want to do it yourself, "Wonky Donky" on here will do it. I have used him for both modern and classic repairs and he is very competent, prompt, and reasonable priced and I can highly recomend him. I know he also does the classic repairs for the UK FWB importer.

If you can't find his contact, email and I'll forward his email to you.

Best of luck
Robin