The web site for Camping Gaz is http://www.camping-gaz.tm.fr/, but I have just tried it and failed to get on. I can't find a web site for Camping Gaz in the UK but they must have a local agent.
Camping Gaz is available throughout Europe and those who chose not to join countries (2) in all sizes in climbing shops, most chandleries, and the dreaded caravanseri outlets.
It is very dificult to get in Sweden ,but not impossible if you try hard;-BUT the fittings are propobally different.if we travel between Germany and Sweden we have to carry two regulators .(and of course a gas engineer ,so as not to infringe EU regs.)I guess Norway is same as Sweden .