If you mean the ring around the cigarette lighter, that is actually a built-in bulb and needs to be ordered from the dealership. The other option, which I'm taking, is simply buying a bulb holder for a 74 base and doing a little engineering to replace that factory bulb socket with an aftermarket one so I don't have to deal with the limitations of having an incandescent.
My Cluster backlights are VLED's. I tried the SuperBrights for fun and they definitely have hot spots. The output and angle of dispersion on the VLED's are simply better. If I could only afford VLEDs in one spot, it would be the cluster backlights.
The part number for the bulb that goes around the cigarette lighter is 84999-10250. When I bought it from the dealer I think it was around $7. I actually have the old one disassembled, and I'm looking at how it might be possible to convert it to an LED. I think the hardest part about adapting it is going to be getting the LED to sit at an appropriate depth to illuminate the ring properly.