Hi audiodoc.
Welcome to our Mattress Forum! 
We have decided to discontinue the provision of listings of potential retailers in various geographic regions (unless they are already approved site members), because of the difficulty in maintaining such lists in a retail landscape that is constantly changing, and most importantly the confusion it was created with the consumer members who incorrectly assumed that these businesses had indeed gone through the strict qualification process and were approved as members of The Mattress Underground. Such an assumption is unfair to both the consumers seeking assistance, as well as the very businesses and manufacturers who meet the criteria to become Trusted Members of The Mattress Underground.
You can perform a Forum Search and you can type in the “key term” any city or area you would be closer to and consider driving such as Baltimore or any other area and see what other businesses have been discussed in that region which may be helpful to you.
Whatever business you’re considering, I would always confirm that any retailer or manufacturer that you wish to visit is completely transparent (see this article) and also make sure that any mattress that you are considering meets the Post #13 quality/value guidelines here.
Once you have a chance to narrow down your options please let me or any of our Expert Members know and if you have more specific questions will be happy to assist you.
Phoenix