Ben, I might be able to help with some of those parts. (I have a 44 WD/CO project which is also for sale! with various duplicate bits,) so drop me an email to trials59(AT)yahoo(DOT)co(DOT)uk and I'll see what I can do. I am in NN12 postcode if you want to have a look.
REgards, Mark
Stuart Bray has some rear pegs on his site.
Contact Jan on this forum as he made me a Speedo bracket.
Riders pegs are difficult to find as the original configuration. Try Hitchcocks for alternative options.