Work in progress .......I found a US site www.stainlessbits.com that lists all the fasteners by their original part numbers, so you have to cross reference the parts manual to determine that fastener's location on the bike, but I'm doing it ......GH
If you have a technical question why not try posting your question
on the Made in England list, the mailing
list for British bikes in Australia and New Zealand. One of its 226
members should have the answer from you.