Someone posted in Facebook the Etsy link below. Pretty good selection and reasonable prices. comes with 3M adhesive. I may get the carbon fiber one. Raised Tailgate Decals Stickers Insert Letters Compatible With | Etsy
My guess is supply and demand. most people will order the matte black. I went ahead and ordered the carbon fiber ones, hopefully they look goodHmmm. That's got me tempted. Those are nice looking, but I don't get why the matte black is so much more than the others.
I ordered some from eBay (slbdecals2014 seller) and never got the S to work- it dimensionally was off just a bit and didn't fit well in the flat part, plus the material was so thin that it was difficult to manipulate, it wasn't like a Cricut vinyl piece that has the removable cover to keep it stiff. As a bonus though if you leave negative feedback the seller is really insulting and it's funny.