ICON still builds some of that stuff
& the now defunct GM Kodiak mid-size 'intermediates' 26k # axles
some even with truck beds on them, like a cowboy limmo
couldn't use them for anything practical, too tall just pissing away $$$
I had a 93 Kodiak Intermediate International Diesel
(Later a Detroit Diesel Allison trans)
with a 6' sleeper, kitchenette, gooseneck/flatbed
(later converted to 5th wheel)
I got a killer deal on it with 5k miles on it, a lease return/turned in,
like new, still has the lil' nibs on the tires
that I used to tow my 43' Featherlite Alum, 3 axle enclosed race trailer
with an elevator/lift storage for 2nd car & living qtrs/restroom in front 12',
bed over the front overhang, fuel storage, air tools,
spare parts in lockers under a bench, storage cabinets in it,
For hauling my T/S or P/S cars & Altereds, all over the US...
for about 10 years
they weren't cheap,
like 3 times or more the price of a Big 3 reg 1 ton dually, loaded
but well worth the price if you towed long-hauls
They were commonplace out west, for the time they were still around
like a 4-5 ton truck/axles etc. vs the 1 ton dually's Big 3 mass production,
when you needed something smaller then a semi/tractor trailer
but the 1 ton dually wasn't cutting it anymore