Not sure about US Toyota Camry hybrids but Toyota Canada offer "Park Pilot" as a dealer installed option. See:- toyota.ca and go to the Camry options list.

I have ordered this option but I'm still waiting for delivery of the vehicle. The Toyota list price is C$456.

If you don't like black sensors on your bumper, (and who would) why not paint them? I did this on a Pontiac Bonneville I owned and they still worked just fine.