Check Dixie Gun Works
Also run a search for cannons over the internet. There are several companies that make reproduction cannons for re-enactments as well as collectors. While not what you may be looking for, certainly a good source of reference as many of them have good profile information.
http://www.cannonsonline.com/midas/co_r_showCat.asp?category=5
http://www.nvo.com/cannons/classiccannons/item.nhtml?profile=classiccannons&UID=117
http://www.cannonltd.com/index2.html
Also check the website for the Castillo des San Marcos National Monument in St. Augustine, Fl. They have a large collection of 17th and 18th century spanish and english guns of various sizes. Most of these are on naval carriages or garrison carriages (which are very similar to naval carriages).
Mike
Mike
"Imagination is the dye that colors our lives"
Marcus Aurellius
A good friend will come and bail you out of jail...but, a true friend will be sitting next to you saying, "Damn...that was fun!"