Fiat 132 gearbox parts.

I need the output shaft tail end of the gearbox containing the bronze bush,as
mine has worn and lets the shaft break up the oil seal.
I have no gearbox spares so any parts or a complete gearbox would be
useful.The engine is a 2 litre twin cam and is installed in my Marlin Roadster
that I built myself and put on the road 32 years ago.
I am also interested in any engine parts you may have.
Regards Keith Biddulph.