I made my own wand, which I also use for cleaning the swimming pool cartridge filter.
Its a two foot long piece of 1/2" PVC pipe used for electrical conduit so it has threads cut into it. I glued a cap on one end and a brass ball valve screwed on to the other with a fitting that mounts to a garden hose.
Once I glued on the PVC cap I took a 3" cut off wheel to it and cut a 1/16th" wide slot in it on the side. Nothing to fall off, plenty of pressure and frugal.
It works just fine, though I seldom have a need to deploy it. Usually just once a year, maybe.
Bummer on the $$$, sometimes you just gotta do it.
2000 Roadtrek Chevy 200 Versatile
'15 Kawasaki Versys650LT
'98 Kawasaki KLR650