hi Jacques
Yes , swap meets these days generally cater for the guys with EH Holdens ,XK Falcons and later vehicles . What annoys me is, the tables loaded with plants, clocks and pots and pans for sale. Some organizers will not allow this kind of stuff but some of it creeps through despite the rules.
At the Pakenham swap, I don't think I spotted any parts at all for pre 1950 vehicles . Nothing
I did buy a few things from a certain vendor who always has some good stuff, like some new Norton grinding Alox. 7" wheels $5 each , he also had the stencils . He seems to attend most of the swaps around Melbourne.