Oh, and concerning building and selling them, I checked the prices of the machinery need to produce in great numbers the plates, and it would be about 2000 € for the special shaped cut mouldings. Add to that the cost of printing the images on the plates before being cut, the plastic plates, and assembling them later. I did this research to see if it could be a good thing for subsim.com to sell them, but I concluded that it means a too great initial investment.
Hand building would be out of question for me in this case, as you can't afford the necessary quality, durability and specially, number of units.
Sorry