The Anker unit is not a cheapo Chinese noise box - it is a well manufactured high output current USB supply from a US company. They are very good and at a fraction of the price of the ChargeN devices were a lot of people's USB supply of choice.
They seem to have discontinued it in favour of all-in-one plug-in ones. I have one of them for the car, and very good it is too, but fag lighter plugs always rattle loose in a plane in my experience, especially with 3 20AWG USB cables hanging out of them.
If all else fails I may have to tear an 'all-in-one' Anker apart to make a 'wire-in'able one.