Lucas Switch Socket Terminals

[Csx355]

Hi all - I am just about to re-wire my 1961 B40 - which surprisingly still has it's original albeit Very Stiff, cracked and tatty harness. What I need to do is source some of the micro pin brass terminals that fit into the sockets that push on to the back of the ignition and lighting switches. I have looked but don't seem to be able to get them without getting the complete socket assembly. See pic attached.  Does anyone have a source for them please? Many thanks.