The better options or possibilities Iām aware of in the Washington DC area are listed in post #2 here. You may need to call some of them to make sure they carry mattresses that fit your criteria but there are several there that are āpossibilitiesā.
@ AnalogJ
Iām guessing you mean Flybynight in Northampton? If thatās who you mean they are a BE dealer and also carry other mattresses as well. You can see my comments about them in the post #6 here and they are included in the Springfield/Northampton, MA list here. A forum search on flybynight will also bring up more comments and feedback about them as well. A forum search on Berkeley Ergonomics will also bring up much more information and feedback about them and as you know I also I think highly of them.