Just about any business that is into selling motor home parts could get it for you, but right off the top of my mind: there is PPL motor home parts and sales in Texas that would either have it or direct you in the right direction. Also look up Coleman or Dometic, they might have what you need.
2002 Gulf Stream Scenic Cruiser
2018 Buick Envision Essence
Neway Freightliner chassis
Aventa II Blue Ox