I know I saw a post for this somewhere here... just can't find it now. We all know how finiky the suction cup holders are. Mine is staying put and I'd like to keep it that way so I don't want to take it down and out it in the other car when we use it there. I don't really need the 'alternative mount kit' from TomTom. Is there somewhere I can buy another cup mount? ...inexpensively.