I ran a set of the Staun liners for a while around '05 and while the idea is sound and they worked to keep the beads on, I had them in a set of H2 wheels and I was breaking the bead edge off the wheel. I decided that if I had to weld reinforcing rings on the wheel to work with the liners that were a little bit of a pain anyway I might as well just run a beadlock and I went back to TR. In a more street oriented vehicle or just more gentle use and/or maybe with a beefier wheel they could work well. I see them being really good in sand and snow where you basically don't put air in the tire. I did use the run flat feature of the Staun one time limping out of a trail but it created a lot of heat to the point I stopped and aired the tire up a few times to make it back to camp. I found a lot of rubber crumbs in the tire after that so the liner was grinding on the inside of the tire quite a bit. That feature is good to get you to a spot where you can change the tire safely but unless someone is shooting at you or you're racing, it's not really a usable run flat.
In the real world, I've run my 40" trail grapplers on the TR HD17 down to 2-3psi in the snow and didn't lose an inside bead and I'm not going to ask for much more than that.
Vintage US made TRs are nice to find if you can but I'm not really sure they're better than the current flow formed chinese castings, other than being not chinese. A bit of trivia for those new to the game, Larry at TR fought tooth and nail to keep wheel casting in the US, to the point that he had to leave the wheel industry foundries when the last one shut down and he tried other foundries but just couldn't get things right. He ended up having to go off shore just to have something to sell.
At this point, overall beadlock tech is pretty mature along with the casting tech to make a tough wheel so you get good stuff from a number of places, not from just a small handful of places like 20+ years ago.