Thank-you for the pointers.
I'll try getting in touch with the Newark Irregulars, although I won't hold my breath given it was so long ago. Likewise, looking at the Mega Miniatures site, it said they'd destroy the mould & master so I doubt that girl's still available. I'd already noted the Pulp figures & I reckon I could make her work with a bit of re-posing if the other 2 options draw a blank.
That engineer would probably suffice as a steam engine driver, & the one with the hammer could probably be turned into a fireman by changing the hammer into a spade.