CLASSIC UPLAND SUPPLY
Folding canvas carts.
ADVENTURE DESIGNS

1/3 scale Chuck Wagon gun cart

AMISH CROSSROADS
Gun cart kit

GUN CARTS.COM
Gun carts and gun cart directions
MUSTANG WOOD CRAFTERS

Folding wooden gun cart.

WOODEN WORKS WEST

Folding wood gun cart

A PAGE OF GUN CARTS  
This link is to a very informative page about gun carts,
by Curt Rich.