Check with Chuck Cayo, Cayo Repair Service, Watervliet, MI - (269) 463-5068. Chuck's grandfather was one of the three founding members of Avion. His father and he are the source of all knowledge on Avion and Cayo products. Plus, he is one hell of a nice guy.
He should be able to ID the trailer for you.
Would you rather have a mansion full of money or a trailer full of love?