A Lexus Field Tech Specialist made me aware of an aftermarket harness for LC500. Car Tunes in Largo, FL located the harness via a simple internet search and attached a standard front or rear camera. They did the installation for $600 total. The harness allows the camera to integrate with the stock display. When parking just push button on dash and front camera is on for 20 seconds. If you need more time, just push button again. Attached are pictures of camera in grill-(no cutting needed), picture of button and front camera view. Works like a charm-no longer stress parking.
Also note carbon fiber wrap to door sills-looks great.