Have you read the geekhack TOS lately?
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https://geekhack.org/index.php?topic=80020.0
Could look into getting a set printed at WASD, but I don't know all the logistics of that.
http://www.amazon.com/4Keyboard-Adobe_Photoshop-photoshop-keyboard-stickers/dp/B0010YQ6WQYou aren't going to find anything like you linked that fits a mechanical keyboard, but you could always go with some stickers.