On the west coast there was a similar unit. Was it made by Steam Services? I don't know for sure, but it looked a lot like Deep Steam maybe a little more primitive if that's possible.I had a buddy, 1973ish, who was going to take over the world, or at least KY with one of those.
He flew to California and bought it from Arlen Knight.
Thats why units like relia built are so valuable to many.A lot of people live in areas where you can't get service from the major brands. You have to find local people who service the components for other industries. Cat dealer for the engine, pressure wash dealer for the pump, etc.