DG Machine in Auburn. Dale Green and his lead machinist are both racers. Great guys, probably pretty busy though. Not necessarily Mopar guys, but performance guys for sure.
Herrmann Motorsports in Bonney Lake. Dan Herrmann is a die-hard Mopar guy, and a racer. He’s a small one man operation, might be longer lead and a little loose on the business end, but I like the idea of supporting small guys.
I had good luck with Pacific Engine Builders in Tacoma. Not a performance shop, but they have nice machinery and are as capable as anyone if you know exactly what to specify.
There are others, but these are the ones I have experience with.