The dock required soldering, not the charger. Buy this and you'll be fine.
Don't need $20, this $7 one is more than enough. It's a 1A charger too.
I'll respond to your comment because I'm not sure if the OP is asking about a car charger.
This is hands down the best car charger around. I have one and have recommended it to all my friends. It's cheap, good quality OEM and charges correctly and quickly. Make sure to order it from Amazon and not a third party.
Non-mobile link here: http://www.amazon.com/Motorola-Vehicle-Adapter-micro-USB-Charger/dp/B000S5Q9CA
I personally have a Motorola charger, which works really well: http://www.amazon.com/dp/B000S5Q9CA/
I've run with a few generic USB chargers (ones that you'd need an additional microUSB cable with), and generics break down pretty quickly.
The only way you can get your Nexus 4 to charge with AC is if you hook up an inverter, which costs at least thirty dollars, and then use your normal AC charger with that. I'm concerned you're using terminology that doesn't quite make sense in this context.
Any decent charger with >= 1A output will work for you. The Griffin recommended in the link looks fine... what's your concern about that one?
Edit: Ah, I read some of the comments reporting that it's "Charging (USB)". That looks suboptimal. The Motorola charger I linked charges fine with Navigation and Bluetooth streaming both on, in a brightly-lit car. I can't think of any heavier use. I've not tried the Griffin personally, but it does read like it supports mainly Apple products, which would be quite odd--I've not seen such behavior except when the charger was actually only 500mA. For a few dollars, I'd recommend trying the Motorola, since that works great for me. Good luck. (:
Android will report "Charging (USB)" when it's charging at ~500mA, and "Charging (AC)" when it's charging at >500mA, for example, at 1A. You can be charging it with a USB car charger that outputs 1A or 2A and it'll read "Charging (AC)", even though that's really charging with 12V DC -> voltage regulator -> 5V DC--no AC required! Sorry for the confusion.