Check out this place they have them http://www.phoenixgraphix.com/ i'm about to buy a set for my duster from them,my brother got his from them no problems.
I got a 69 Barracuda side strip with a 360 call out from these guys http://www.performancecargraphics.com/. I just asked them to replace 340 with 360 when I ordered it, same price as the stock 340 stripe.