I use the same style cart for Texas Army reenactments and Cowboy Action Shooting.
Also, I found an old cart with hand-formed metal pieces that is the exact same size, and plan to reuse the metal.
While on a trip to Germany, they had these carts hanging from the ceiling of a restaurant, and there were a bunch of different sizes. This is a world-wide style that has been used for several hundred years, but very few are used in reenactments. I find it VERY useful, especially if I'm just there for the day, and need to carry all of my stuff to the site.
This is my cousin in Texas, known as Senor Juan de Los Brazos, at Gunsmoke, with THSS.