bry3500, thank you so much for taking the time to find and compile all those links for me. I already have all the Scalextric, Pendle and other slot car stuff, and I've tried to tap out the Aussie resin makers for the main racing marques like the Chargers before and have them, Manaros, Falcons (XW/XY/XA-XC), Torana XU-1s, etc. In fact, I probably have around 50-60% of the marques of the 68-78 B&H 500/1000 races. I am trying to get a resin caster to take an old 68 Dodge Dart and cast some more, so I could maybe convert them to Valiant Pacers, etc.

I have contacted a British resin body maker who might have access to those old Hillman Hunter and Avenger bodies you cited, but it looks like I will have a harder time finding those Sharp Sunny models, but I'll keep trying!

Thank you again, and any other leads are appreciated.