Many thanks to all posters (Takestock espec) highlighting Repairkits Uk Carl Dawes' replacement contacts and repair kit on Ebay. Fantastic service - ordered 4pm arrived in Essex from Staffs the next morning - and all for less than Ã‚Â£12.50!
Even better, being a CDT, there was no need to remove the battery box to get the starter motor out - just loosened the airintake. Job done (by a mate who knows what he's doing!) in less than 30 minutes. Cheers all. Robert