Now that you've informed us, I will be looking out for the lowboy trailer too. I have some 1/16 scale stuff. The Pete 359, KW W900 Aerodyne, a couple of the Fruehuaf trailers.
Some 1/16 scale after market stuff I got from Australia or New Zealand (can't remember which) back in the day.
A Detroit Diesel V8, Cat 3406, Cummins Big Cam, half and tandem fenders. A Peter 367 cab that was cast by amateur.
Some day I will put this stuff to use.