The quotes so far have been surprisingly reasonable:
Adrian Flux - £186
2gether - £185 for parts only, £202 including labour
Graham Sykes - £220
Frank Pickles quoted £108 for parts only, but sadly don't insure on the chassis number any more.
I'm pretty happy with that considering the renewal for my tin top just came through at £480! (although after a brief discussion they managed to knock it down to £280
).