I am looking not to have so many different moving parts, the 12v female cig adaptor, to cig usb plug, to cord. I have set it up this way in the past and had an issue with it twice over the 9 years I had my truck with the XM radio hooked up to it.
This solution looks like an almost perfect fit!!!
Small all in line from the 12vdc tap, right to the usb plug and the correct size for the converter....... humm i wonder.
Amazon.com: DURAGADGET Hard Wired Mini Usb Cable / Transformer: GPS & Navigation
Also, now that I found the exact wording I need to search for I found these options as well.
Amazon.com: DC/DC Converter 12V Step Down to 5V 3A Power Supply Module: Electronics
Amazon.com: Axxess Interface AFDI-5V Ford 12V to 5V Step Down: Electronics
Amazon.com: 12V DC USB Converter, 10-32VDC In, 5VDC 1A USB Out: Electronics
My next issue is finding the right size wire tap for the leads heading into the cig adapter under the radio as that will be my source of power.
And since the converter says it is low power I am hoping 1A will be enough from the 5v. I can't seem to find the spec for input power for the converter anywhere.