I've always thought about somehow putting one on my sedan like a member had done years back. I don't think it's rice at all, as long as you have the right combination of exterior parts to complement it.
I don't think it was purchased. I think it was made by combining the diffuser off of, I think, and after-market s2k bumper with the factory accord bumper.
The fitment looks terrible, but it's a nice attempt. You'd need quite an aggressively themed car to pull off a rear diffuser like that though, not many Accords can pull it off.