Hi Almbriano,
They are included in the first link I listed and carry Gold Bond mattresses (you can see the mattresses they list on the Gold Bond site). They are wholesale manufacturer that makes some good quality mattresses and can have better than average value depending on the prices they are selling for at any particular retailer.
Depending on the type of mattress you are looking for, your budget range, and the time involved in a drive to NYC … I would suggest a phone call an/or a visit to Dixie foam and Scott Jordan would also be well worth while. NOTE ADDED: Scott Jordan is also now a member of this site.
Post #4 here also has some possibilities that are closer to you but they may require an “interview” first to find out whether they are able and/or willing to let you know the materials in their mattresses.
Phoenix