I have no idea what the wear characteristics of the 3D material is and then you have the time involved in making up the program as compared to the market volume. The material and time involved in printing them is insignificant, once the printer is running it will spit them out. My son in NZ has 3 printers running quite a bit producing stuff for his work so producing these would not even be a blip on his radar once he had the program on a usb stick
