Hi 2CME911,
There are some high quality factory direct manufacturers or better retailers either in or very close to Portland. Some have been mentioned in several threads so I thought i would consolidate them here.
PORTLAND, ME area:
http://www.portlandmattressmakers.com/ or http://www.boatmattress.com/ Factory direct manufacturer in Portland, Windham, ME and Portsmouth, NH.
http://www.dalybros.com/ or http://www.maidenmaine.com/ Factory direct manufacturer in Biddeford, ME
http://bedderrest.com/ South Portland, Auburn, ME. Carries Pure Talalay Bliss and Gold Bond mattresses.
For those that are looking to try a Talalay Latex mattress then Pure Talalay Bliss also has a retail store finder on their site here.
Some of the threads that mention the two Maine manufacturers include …
Have you heard of
young adult looking to purchase first mattress
guidance please (also includes information about Gardner in the Boston area)
and Post #8 here
BANGOR, ME area:
I have included the brands they carry (according to their sites) that I would consider on a “mattress by mattress” basis and as always make sure you can find out the details of what is inside any mattress you are considering.
http://thebedworksofmaine.com/Sleep_Shop/Mattresses.htm Brewer, ME. Savvy Rest, Glideaway (Sleep Harmony).
http://www.tuffybear.com/sleep-center.aspx Glenburn, ME. Symbol
http://www.brownapplianceandmattress.com/ Ellsworth, ME. Ergovea
http://www.richardparks.com/ Ellsworth, ME. Natura.
http://www.trentonflooringandfurniture.com/ Trenton, ME. Symbol with 5 lb memory foam
http://perrysfurniture.com/ Belfast, ME. Gold Bond, Pure Latex Bliss
http://www.davisbrosfurniture.com/ Guilford, ME. Symbol including gel and latex.
Mattress Sets, Bangor, Maine, Sealy | Dorsey Furniture Holden, ME Sherwood, King Koil
NEW HAMPSHIRE area:
Some of the better choices or at least “possibilities” in the NH area are in the Merrimack list in post #4 here and in the Portsmouth area list in post #2 here or the Topsham, VT list in post #4 here but there are not as many options as the ME or the MA choices that are available to you.
BOSTON area and south:
Some of the better choices in and around Boston and into southeast Massachusetts are in post #2 here (and there are some very good choices here).
Some of the posts and threads that mention the Boston manufacturers include …
Post #11 here
Post #5 - #16 here
This topic
Post #8 - #11 here
Post #8 and #11 here
Post #5 and #6 here
Post #5 here
The “Protectors, Pads, and Toppers” thread
This thread and post #6 here.
SPRINGFIELD, MA area:
A few more good options in South/central MA are in post #4 here
Some comments about these are in the Need a Mattress in Amherst, MA thread
Hope this helps. You have some great choices in the general area 
Phoenix