Here is what I used:
Cree 3W Dimmable LED Puck Light in Black
3M Double Stick Tape
If your not as lucky as me, and your lamp isn't the correct voltage, you might also need a power adapter. Our 6W 12V Adapter should do it.
Bryan C. @ Elemental LED
Step 1: Disasemble Original Bulb Fixture
If you need to use D/C you can follow these steps but in addition you have to swap our the original transformer for a D/C power adapter like our 12V adapter and wire it to the switch of the lamp.