http://www.sportsimportsltd.com/aufrreulpase.html
thats where the systems i was looking into at.
im not sure if they are good or cheaply made and pos's
and i dont know of any notable brands for park assist
they are not alllllll that hard, but its going to be a do it your self thing, which i am not comfortable with, lack of self confidence, id rather take it to the dealer, and say "back up sensors please(:" and pick it up a few days later with it installed.