howdy bigchap
A mate at school had one of the factory PAW 149 glow engines that were a few available in the early 80's, I think the 149, 249 and 19 were all available as glows. His was the only glow PAW that I saw and I don't think they were on the market that long, so they are probably "worth" a small fortune now...
There are probably enough PAW models past and present to justify a PAW museam in Macclesfield!
cheers