Portable soldering iron???

I had to do some soldering in my car today, not the car itself that's fine, one of my gadgets that plugs in the cigarette lighter, trouble is the wire runs all around the inside of the car to the boot, bloody nightmare to take it all out without damaging it.  The plug bit that goes in the cigarette lighter had lost a contact, soldering it back on is a doddle, running the miles of cable out across the pavment to the cars is a royal pain in the arse, then you have to keep the hot iron off the seats ect.  I need a portable soldering iron........ nows where's Ebay......