Fairly sure someone has asked those guys and the bumper is a fiberglass replica rather than the real thing... Personally I'd always prefer to find the genuine parts rather than go with the FG stuff. But that's my own personal opinion & preference.
TRD Rear isn't hard to find, as Ormi says, you can get it from Toyota for not very much, the side skirts though are near £3-400 if I recall correctly if you wanted them new...
eBay has loads of cheapy fiberglass replicas of course, but the real thing is a bit harder to find. Luckily a member on another forum spotted a breaking IS with these on it, and they only cost me £80 plus post and painting.
I wouldn't say the TTE one is ugly, I just prefer the lines of the TRD one :D