Caravan Basics (Gallowflat G73)

I'm looking for a 7kg gas bottle (empty is fine!), electric hook up cable - basically any of the essential bits and pieces for heat and light!
Our old caravan suffered at the hands of an arsonist, so we lost not only the 'van but everything inside it. We've just managed to get a decent 'new to us' replacement, but although in great condition for its 35yrs, it has come without any 'extras' - it's just the 'van and a step!
I wondered if anybody might have any of those bits and pieces sitting in a shed that might be suitable for an older caravan? I can come and collect no problem.
Thanks for looking
(Pics of the new one and the old one under the trees!)