Hi Radiance!
I can't wait to see an exporter for LuxRender!!!
Contacting Master Whaat seems a reasonable tip to me, as he developed a quite good exporter to Indigo 😄
I'd be happy to give you any scene you need: I'm a perfectionist, and I'm pretty convinced that my geometries aren't affected by normals issues or something, so they're ready to render, somewhat..
I usually model archviz scenes, so basically buildings..
Do you need interior or exterior scenes?
Good luck Radiance and thanks!