Ok guys. I can build a plastic vacform mold to make this top for around $5000.00 which includes materials. I would need an original top to measure so the part doesn't come out small and also use the top to show the vacforming facility to make sure my design of the mold would run in their facility. These parts would be made out of plastic that is the same as current box type sign are now. I honestly have no idea of how the top would fair in the outdoors. I think it should last the same as current box signs do now. The mold would have a life of maybe 100 parts before it would need to be replaced.