It is a faucher industries part prob, so Any body builder/toolbox supplier, I prob have some in our parts department at Superior truck.
www.faucher.ca and
http://www.faucher.ca/1401_Steel_Paddle_Handles.htmlAlot of different sizes to, even smaller ones if your building half doors Just give them the part # as this is where most order or get their stock from
Greggs
Nortrux
Superior Truck
Quest
General Body etc