Would the Geddy Lee signature be a Jetglo 4003 with a Badass II installed?
Off topic now, but I was having a look at Jon Camp's bass in your book, Paul. From memory you mention that you don't know if he performed the modifications (Dimarzio Model P on a modified bridge plate and the black headstock) himself. There is clips of Jon backing up Roy Wood in the '80s, and the bass has the mods there.
I do find it quite strange that Camp went from the twiddly music of Renaissance to Roy Wood's stuff and then ended up in the Groundhogs.