Aussie owners have been doing these kinds of conversions for years and there have been some decent attempts at lookalikes. Until the RR gets confirmed for NA, I would imagine there will be a huge aftermarket stateside for these kinds of mods.
Never been a fan of upfitting like this because it has so many downsides. Only upsides are if you're a hardcore enthusiast and must absolutely have this over anything else. IMO, waiting for a real Raptor is worth because there are certain things automakers can do that the regular person can't.