Liger Electronics via Amazon offers the Liger 3-Port Cigarette Lighter Socket Splitter
in Red or White for $18.95. Coupon code "RLJHY7EB" cuts it to $9.95
. Plus, Prime members bag free shipping
. (Non-members can spend $35 or more to bag free shipping; otherwise, shipping adds $6.28. Allin1dealz via eBay
charges the same with free shipping.) That's $9 off list and the lowest total price we could find. It features an on/off switch for each socket, two USB ports, and LED power indicator.