Kick start

Ive recently bought a 1970 Ducati 450 SCR and as with any 40 year old thing , it needs a service ( 4th gear is almost un-obtainable ) and the swing arm ( Please excuse the lack of technical terminology ) that you put your foot on to kick start has a missing screw, spring thing. Does anyone know where I can either obtain and or get it rectified ( and serviced ). Im based in central london, so the closer the better.

Thank you


PM sent!