Exterior labels / markings - Source?

I am helping a camping buddy attempt to return the exterior of his trailer to a presentable appearance after several years of serious neglect.. Thus far we have removed various stains and discolorations on the aluminum siding and put a coat of wax on it.. The original decorative color decals are still usable and have retained most of their color without peeling. What seems to have suffered the most damage was the various markings (Satellite, Cable, City Water, Black Tank Flush and warning, etc..) Does anyone know a generic source for these labels / decals? We have considered plastic engravings, label tape but he wants the original look... We have tried to contact the original mfg, Nash, but no response.. Any suggestions??