All the stuff I have seen and had made by Jonathan at JKA has been good quality - sails, spray hood and dodgers, but a single phone call easy process it is not.
You need to hound him - but the end product is worth it.
Jason from Puffin covers, he made my flybridge cover this summer. It did however take a couple of phone calls to tempt him but I am a very satisfied customer.
Puffin covers 01248 671333
You could try 'The Boatshed' in Port Dinorwic who have set up in a new shed off the High Street with the Dawson's equipment. Only experience is a recent re-stitch of my sprayhood. E-mail 'covers@theboatshed.plus.com.