I've welded up several for myself,
now I know up there in Illinois, there's bound to be a shop or FFA class up to the local school, if you could draw up some plans & get some steel, I bet they could build them for you. they might even be able to get the steel at a lower cost, I'd go up and talk to the Vo-Ag teacher and just see what he says. lot of times they are looking for projects.