Rob
Try giving Brancato or Baines a shout, either may have a 2nd hand one around or Tony may be able to sort yours out.
But first give Jim at Bike Enders a shout on 01708 455530 as he usually has a few 851 and 888 parts around.
http://www.brancatoengineering.freeserve.co.uk/ Kev
[Edited on 8-12-2003 by skidlids]