I am the Quartermaster of the VETERAN CORPS OF ARTILLERY, New York
State's oldest and largest historic military command, which was
established in 1790 by veterans of the Revolutionary War.  However,
our uniforms and all accessories are patterned after the US Army
uniform as worn during the War of 1812.  I am seeking the names of
civilian organizations that:
     >are duly constituted as American War of 1812 reenactment groups, and
     >are the vendors of American uniforms, uniform accessories and arms used
by such War of 1812 reenactors.

Hi arniea~

An excellent site on War of 1812 reenactments is www.warof1812.ca .
Here you'll find a list of events, histories, and reenactment groups.
Here are just a handful of the groups listed:

* The 7th Regiment ( http://www.cottonbalers.lynchburg.net )
* The 27th Regiment ( http://www.iaw.on.ca/~jsek/us27inf.htm )
* The Upper Mississippi Brigade ( http://members.tripod.com/umbrigade
)

Many others are listed at the site. 

Here's another site that lists War of 1812 reenactment units:
http://www.iaw.on.ca/~jsek/1812unit.htm

Here is a site that includes costume articles that may prove helpful
to you, including accessories; they custom make uniforms (presumably
American as well as British):
http://www.militaryheritage.com/napbrit.htm

This company offers a catalog of 1812 uniforms and clothing:
http://www.jarnaginco.com/rev.html

This very useful re-enactors site offers a list of "sutlers:"
http://www.geocities.com/landofnofarbs/sutlers.htm

This lovely site includes some War of 1812 items, too:
http://www.gggodwin.com/catalog.htm


Keywords Used:
"war of 1812" reenactment
://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=%22war+of+1812%22+reenactment&btnG=Google+Search

"war of 1812" uniforms reenact*
://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=%22war+of+1812%22+uniforms+reenact*

Hope this helps!
kriswrite

Your response was indeed most informative.  It has given me numerous
contacts of individuals within units whom we can contact regarding
whom they have used to manufacture their uniforms and accessories.