It may be sacrilege, but you can buy tinned steamed puddings in the UK - chocolate, treacle, spotted dick...Ah, I'm coming over all gooey.
Seriously though, if anyone is in dire need of a tinned steamed pud, I can always send some by post (provided your country allows the import to dubious suetty stuff in tins). Just drop me a PM.
They're not the same as the real thing, of course, but still darned tasty.