Hi bystander6,
The better options or possibilities I’m aware of in and around the Seattle/Tacoma area (subject to making sure that any mattress you are considering meets the quality/value guidelines I linked in my last reply) are listed in post #2 here.
The SleepEZ showroom is in Tempe Arizona and for those that aren’t in reasonable driving distance of Tempe they would only be available online although there may be other latex mattresses available that would be “somewhat similar”.
Phoenix