Went to Poundland in One Stop shopping center, Perry Barr, in birmingham, they had Signalex USB in car chargers for IPod Touch & IPhone 2G, 3G & 3GS.
Tried when i got home, works great. It has two USB port outlets on the front.
Input: 12 to 24 V
Output: 5 V
Max: 1000 mA
They also had Sync & Charge cables and Audio Cables for IPod Touch & IPhone 2G, 3G & 3GS.