I decided to buy the "replica" Amuse rear from CarbonSignal, only because I liked the fact that the kit had some carbon fiber it in. If Powerhouse Amuse made their peices with carbon then I would have gotten it directly from them. I do not "cut corners", as I like to call it. I just got the TE37 SL's and do not believe in buying knock-offs or replica's. After I get it professionally painted and installed, it will be around the same price as the original. I just wanted to have some carbon fiber around the foglight/rear valence area since there is really no true diffuser for our car yet.
P.S. -
My girlfriend doesn't have fake Gucci purses