I machine sew protective devices for welders. Mostly arm pads, knee pads and hand protectors. I only use Kevlar thread because it is heat and burn resistant up to around 800 degrees. Generally I am sewing together a combined 16-20 oz. of medium tempered Latigos, bison, and veg tan.I currently source this thread from the Dominican Republic. They have a decent price but the color selection is very limited and the shipping takes forever. My question is does anyone know of a domestic supplier for DuPont or equivalent Kevlar thread?