Hi
There are two companies who can fix your Moss Box with new parts to restore the syncro! It is also possable to have the box rebuilt with a completely new set of gears which could offer better ratio's.
I believe also that close ratio gears may be fitted for performance, i believe this is approx £3,000, but to fit a new first syncro & new bearings & seals is about £600, but you best get a quote from the following. ' sales@rw-racing.com ' or 'info@jb-engineering.co.uk '
A company called SC Parts can supply spares ' enquiries@scparts.co.uk '
Robin