I need an electronic component that accepts 12 volts via two wires, not an accessory socket, and charges a USB device via a Mini USB B, 5-pin plug. Charging current should be at least 550mA. This is for hard-wiring a USB device into a vehicle.
It needs to be compact and robust. Ideally the component will have a light that indicates that it is wired correctly. This is a simple project for the right person.
If there is an existing component that does the job I will pay you just for finding it! I've looked, and I can't.
If it has to be manufactured we will need to find a way to produce it in reasonably small lots for under $25 per unit. The cheaper the better.