I picked up one of these from a US seller for 8 bucks shipped. http://www.ebay.com/itm/280948277740
You can use something like the dual port, one to power the BT adapter and one for your phone. Although a lot of times they dont put out enough current to charge your phone as fast a typical wall wart. The flip side is if it puts out enough current you will get audio noise on the AUX line in.
Only bad thing is I need either a right angle or 3/6 inch usb extension so that I can close the console otherwiser the stacked combination of car power adapter, USB BT adapter and headphone patch cable prevent the door from closing since they are too tall.