Hi ndsimpson,
I can see you’ve been doing your homework and you have some good options available in your “driving range”.
The Seattle list (including some of the other options in Washington State) is in post #2 here, the Portland, OR list is in post #2 here, and the Greater Vancouver, BC list is in post #2 here.
There is more information about adjustable beds in post #3 here and the adjustable bed thread it links to including some links to sources that you can use as a value reference.
Phoenix