Both the older (silver style) and newer (black style) paddles, are 'paddles' so I'm a bit confused what you mean by selectors. Do you mean rather than push pull you want pull shift-down on left and pull shift-up on the right? In which case yes you can buy the paddles from a dealer and they're a straight swap for the push pull paddles on earlier year cars.
Personally I've only ever driven mine with push pull so I'm used to them. Easy for me to remember, push either left or right and you go faster, pull them to go slower... I think the down on left and down on right is ok if you're on track with your hands glued to the wheel. For me though, on the road, the ability to change gear with either hand, up or down is preferable to me.