Everything points to this being offered only outside the US... Notice the speedometer units - all are km/hr. Video is from Canada.
I also did a random sampling of non-US Lexus sites, and lo and behold, wherever the LX is, there are paddles.
This is a factory thing - no way it could be port-installed, never mind dealer-installed.
2010 LX570 - Black Onyx/Cashmere (El Jefe)
2010 LS600hL - Starfire Pearl/Ivory-Black Two-Tone (Maximus)
Gone (but not forgotten) Lexi...