Hi Joe
I have a later type aluminium Eddisons owners plate if that would be of any use. I am restoring my van with the earlier brick red livery that was fitted with an enamel owners plate, these were available through Richard Buck at the RRA but sadly are all now sold.
I can help with photo's and dimensions etc for any parts of your van. If you can't find wheels we could make you a pattern.
Brent
http://www.bosspatterns.co.uk/