Right - have done so. First track of Side 2 of Deep Lancashire, actually called "Coalhole Medley". The Oldham Tinkers, like my Denton friend, are of course Greater Mancunians, both Denton & Oldham being there situate. They sing it almost exactly as my friend did, to Oranges·&·Lemons tune, and only the one verse & no chorus. Only difference is that they pronounce "find us" in standard pronunciation with long i, rather than to rhyme with 'winders' & 'cinders'.