Thanks ChrisJohns - I did buy a bib/brace (stupid word for dungarees) from UKwelder, but it was too small & now they don't supply them any more... Ugh - honestly, I've been looking for decent leather clothes for ages. Tried a Tusker bib/brace too - not as good as those Weldas ones. Got in touch with the Weldas guys in Holland(?) to find a supplier. Getting there slowly, but everyone has to special-order them and the sizes are weird, so either I buy a bunch and send some back or I don't bother. Loooong story...
Still doesn't solve the jacket prob...!
Ta for the input - sorry to have dragged this off topic.
I get to the point (or have done - not every day) where I'm pouring bottles of water down the arm of my overalls to cool it down enough that its not burning me.