The 20th anniversary version does not come with any additional faceplates. I don't know why it says they do, but that information is wrong. Notice that the product description is actually for the Silver version, so whoever set the ad up goofed up.
in the instruction booklet (at least the one I got.) your not supposed to change the faceplate of the 20th anniversary edition. it sounds stupid I know, but I think thats to keep this particular version special because it can't be changed.