By the time you hire someone to design it, print test pieces, tweak the design, print more test pieces, finally production print it, polish it, and finally paint/plate it, it's going to be very expensive also. Parts coming out of a 3D printer normally have very bad surface finish and will require hours of sanding & polishing before they will look acceptable. Plus you need to find a plastic that is weatherproof. Not every printer can print those materials either. Plus this is a fairly large part. Not too many 3D printers can handle parts that big.
