Mini USB hub for powering devices - where to buy?

[HPF]

Anyone know where I can buy something like this or this but with four female mini USB ports and preferably a cigarettlighter contact (regular USB will also do) for power.

I have a dashcam, GPS, smartphone and a speedcamera alertbox. They can all use mini USB contact for power so I was thinking of having a mini USB hub on the dashboard and run one cable down to the cigarettlighter contact instead of the cablesalad i have now.