I'm gonna bump you on this one....
I too am in the PNW (Everett WA area) and would love to find a GOOD trustworthy shop to do this work.
I am not too sure we can find someone to do it though, it is damn near impossible to get a tire shop to service the tires on my truck because I disabled the TPMS a long time ago and they insist I need to spend $$$$ to replace my TPMS sensors or they won't touch my truck due to "liability".