Wily,
I agree, Kingston are the worse.
Hydra Master has an awesome valve that goes into their wands.
I don't know though if you can make them fit your wand.
I am sure Greenie or Lisa or others will know the name and if you can get it.
Joe has the best wand valves..for awhile I was helping him work on some things with them...don't know where it all ended but knowing him....he does not leave his products half assed....