Hi kansashane,
You may have seen this already but post #2 here includes a list of the better options and possibilities I’m aware of in the Portland area that may be helpful.
The 45th Street Bedding mattresses at The Mattress Lot are Dunlop latex mattresses and may be in a firmer range and it may be a good idea to test some softer Talalay as well (the Dreamfoam Ultimate Dreams latex mattress uses Talalay in the comfort layers).
Phoenix