When I bought mine at the local "stealer", the total cost was around $100 all said and done. They have one part number for the base, another for the wiring harness, and another for the bulb/lens assemblies (you need 3). They just snap into the base and 2 prongs fit into the plugs on the wiring harness.
After I got mine I noticed the bulb/lens assemblies could be had at NAPA, probably for a lot less.
You might try ordering the base and wiring harness from someplace like Mopar4Less and save a few $.
-Jay