Paulssen was my thought, too. Glad to hear he's still around; he used to come to the shows, but I haven't seen him in a while. He published a newsletter, too, if memory serves.
His range included a pigeon loft wagon, I think. I'll have to look through my archives and see if I still have any of his catalogs or newsletters.
I can check about Carl Hoegermeyer's Quartermaster Corps, I have some older catalogs of his, too. As far as I know, he doesn't have a website, but he's a member here and checks in occasionally, so maybe he'll see the thread and give us an update.
If you're not averse to building kits, there are some kits out there, too, including some very good ones in styrene, for the scale modeling hobby.
Prost!
Brad