I just installed a Kuryakyn "handlebar electrical power point" to my bike for charging cell phone & GPS but it includes a lighter. Looks pretty good, easy install. I preferrd to have it on the bars rather than in the bags, although I may add a pulg in the bag at some point as well.

Jay

 

This is the one I installed on my RK too. Nice quality, looks good on left side of bar and just throw the cell in the windshield bag when charging, otherwise cig lighter stays in it. Pricey though.

 

6$ walmart in the marine section it came with a bracket that fit the middle acorn nut of windsheild strut right next to windsheild bag ran wire to auxillary jack (so it could be shut off with the aux switch in rain)