I have a Bennington Pontoon (18' - 2000) and I'm in need of a right rear corner deck trim/molding piece. This is the outside deck surround - approximately 3"+ in width, metal (pot-metal I believe it is called) trim. Where can I order this part? I am not sure when or how I may have loss the edging corner. Pontoon looks bad without it. Thanks for your help.