You can put one together for pretty cheap shopping around.
Nice thing about Cary/Got Propane is you get all new, EVERY part for your particular application, and direct phone access for technical issues and questions.
Still too $$ for my blood, so I piece mine, but I've also had to tweak, rebuild and diagnose old, used stuff.
No help up north, but for the Eastside area, I found Bruce (I think they was who it was) at Pacer Propane in Redmond very helpful, and a fair deal on parts like fittings a hose (the biggest issue I had finding on-line).