Hi Chris,
You may well be right, having been in the business, but what I understand is that plexiglass is poly(methyl methacrylate) a thermoplastic polymer.
And Lexan is Polycarbonate.
Plexiglass tends to shatter/crack more so than Lexan.
The names are used interchangeably, rather like "restored" and "repainted".
They are similar, and look the same on the surface, but are different underneath.
Lexan is softer than plexi and scratches more easily, but is stronger.
Lexan is used for bullet proof windows.
Rob, who isn't an expert, but who did study hard before choosing the material for the trailer windows.
Waiting for "someday" will leave you on your deathbed wondering why you didn't just rearrange your priorities and enjoy the time you had, instead of waiting for a "better" time to come along...