I installed these yesterday:

I disconnected the stock idiot lights and ran the wires into the headlight bucket, drilled the 2 holes, and soldered up 2 of these:

Radio Shack only had red and green. I wanted to have an oil pressure light (Red) and the State of Texas requires a high beam indicator (green). I don't care about having a high beam light so I left the neutral light wired up inside the headlight bucket and after I pass my inspection this month I may swap the wires and have the green light be my neutral light.
Total cost? Around $8 for the LEDs and a few minutes of my time.