Wondering if anyone can give me the length of the spring, and a source in the US for new ball/spring parts for my A10. Everything I've found on line has been in the UK. I don't mind buying it there, but shipping is twice the cost of the part.

1960 BSA A10
2007 Suzuki Bandit
1957 A10
(Used to be a Triumph here)
71 Norton Commando
17 Triumph Bonneville