Anybody know for a suitable alternative for a Camping Gaz 270 Plus Threaded cartridge that would fit quite an oldish Camping Gaz lantern that has the pull down handles on the side and and a base on it to keep in place. I cant find one anywhere. Or would it be ok just to use a normal cartridge and take off the base and restraining metal bars? Lantern is still working in perfect condition and I'd be loathed to throw it out at the mo.