The mold appears identical to the one used to produce
Amerigo trailers.
Amerigo sold shells to Liberty Coach (?) and apparently to
Boler as well. For
Boler it was a way of filling a gap in their product line without the expense of developing molds from scratch. For
Amerigo it was a way to utilize excess production capacity. Such relationships are typically short-lived, so it’s not surprising only a few exist.
I’m remembering when Ford
sold re-branded Mazdas to fill their subcompact gap and Mazda
sold re-branded Explorers and Escapes to fill their SUV gap. Many others did the same. Even now I seem to recall the current Toyota Yaris is a rebranded Mazda 2.