Geoff you have come to the right place as the VHGMC hold the factory records and I am custodian of them.
933318 was despatched on 21-8-59, dealer was Weeks, and machine was delivered on 11-9-59 to D W Crampton, Cavershaw House, London Road, Ditton, Kent.
If you need any help with the machine please let me know your e mail address via personal message on this website. I have owners manuals which include parts lists.
The original engineering drawings are held at Museum of English Rural Life (MERL) in Reading.

Geoff, yes e bay is probably the best option as there will be a wide audience. Current lockdown rules may be a problem regards collection though.