So I trawled the charity shops and found this gem. Five litre capacity Aluguss Brater crackle black cast aluminium with Pyrex lid! Didn't look as if it had ever been used; £3.75!
Googled up the name and found one for €30 on e-bay!
Racked my turbo cider into a clean demi-john, and couldn't resist a taste! My voice went a little hoarse, still fermenting (3 weeks now) methinks it may have to sit a long while to mellow!