Glad to report that the folios arrived safely. Hopefully, they might be of some use, or interest, to others in the future.
They were purchased from Jock in 1983 as being the only in-depth source of information that I could find. I wasn't disappointed. However, my means were less than my dreams, so I landed up purchasing as Virgo Voyager in kit form. Given outdoor space at the factory, to complete the fitting-out myself, before launching at Bridport, was a useful experience in the workings of Newbridge boats and the process of squeezing a quart into a pint pot.
I have never regretted the decision to select Junk rig, as the best all-round driver, for my sailing aspirations.
Many thanks to all who provide support, here and elsewhere - it is much appreciated.
Regards Tim