You could do that I don't know what the stealership charges, but it would be cheaper to get some new ones from ebay. You can program them yourself just have to do a little searching to find out the procedure.
this would have helped before the dealership took $50I believe these are the instructions you need.
1.Close all the vehicle doors.
2.Insert the ignition key into the ignition lock cylinder.
3.Press and hold the door unlock switch.
4.While holding the door lock switch in the unlock position, cycle the ignition ON, OFF, ON, OFF.
5.Release the door unlock switch. The doors will lock and unlock to confirm the program mode.
6.Press and hold the LOCK button and the UNLOCK button simultaneously on one transmitter. After a delay of approximately 15 seconds, the doors will lock and unlock to confirm the programming of that transmitter.
7.Repeat the previous step to program up to 4 transmitters.
8.Turn the ignition switch to the RUN position in order to exit the keyless entry transmitter programming mode.
9.Operate the transmitter functions in order to verify correct system operation.