There were some vendors selling figures at the MAAM WWII Weekend in Reading last week, but there were a lot more vendors selling model kits. And both groups were far outnumbered by dealers selling 1:1 scale items. I agree with the comment above, you might find some people at a re-enactment, whether a re-enactor or a patron, who might like a souvenir, but probably not enough to attract a larger number of dealers.
There was one gentleman selling plastic conversions, who used all kinds of contemporary plastic figures (eg, Armies in Plastic, Barzo), as well as scale model kits by Tamiya and Monogram. He trades as "Axis of Plastic", so you others here in the East Coast, keep your eyes open, you might see him at other re-enactments.
Prost!
Brad