It is a new curtain as I have a small light leak, and the lower shutter speeds need adjusting, I just got an email and they said about £180 more than I paid for the camera and lens, but that sounds like an ok price?
I had the same done on mine some years ago by someone here in the Netherlands. It's a few hours work I was told plus the material. I'm not sure if that quote is reasonable as my repair was carried out under the guarantee. You could get a second opinion if you like from the guy here in the Netherlands ... http://www.kamera-service.info/
Give Malcolm Taylor a call, he's highly recommended and repairs one of my friends Leica's. He's Leitz trained and probably more reasonably priced, he's supposed to the best in the UK.
Malcolm Taylor
Herefordshire, UK
Phone No 01568 770542
He does restorations for the Leica Museum apparently