Yes, wasn't I lucky to find them at my favourite scrapyard! (it's actually quite expensive there!) but they still have things that are not easily recognised, I knew about that set of casings for years, but never knew what they were off of, untill I started to get an interest in Enfields. Maybe the sidestand is there as well, will search next time I go there, was it used on other models too??
Cheers,
Lex
PS, I have a bakelite/hard rubber script Enfield pump, but will use it on my Royal Baby.