There are simple 3D people at the Google SketchUp warehouse in Collada .dae format. When you import them into Strata they will be invisible. Crank up the Stencil to 100% and Ambient light to 50% for each texture that imports to make them ready to render.
Some of these models are just 2D billboards, but there are also some 3D people in there as well.
Thanks Kevco - not sure how to use the Strata flat people . . Thanks Tbgriswold the SketchUp figures are more like what I'm looking for. For some reason though, the guy's head is there in wireframe but doesn't render . . . ?