I think that Burro
offered a partially assembled trailer, but that was years ago. There is really little incentive to offer a kit when the existing FGRV builders all have a standing list of back orders. What you might do is look for "Projects" and just pretend it is a KIT when you get it home.
As is oft mentioned here, the life expectancy for For Sale
ads, that are really good buys, falls into the hours category.
Have you been looking on every Craigs List in Texas as well as here Molded Fiberglass Travel Trailers For Sale | Fiberglass RV's For Sale
at least THREE TIMES A DAY?