Yes, These http://www.hobbyking.com/hobbyking/s...er_20_22L.html
but you will still have to reverse the shaft. Pretty simple job with these. Be quick ... they sell like hotcakes.
You will also only be able to use the propeller holder type that grips onto the motor shaft rather than the bolt on type (both are supplied) I usually rough up the motor shaft with a course file or similar to lessen the chance of them coming off in flight.