Hobby King!! International warehouse. Shipping will probably be less to you than it is to send them here to the states. Here's a 3000, 4200 and 5000 battery and the charger for them that's even got the EU plug. The batteries all come with Tamiya connectors. Can't get much easier than that. Just decide how many you want and go for it!
http://www.hobbyking.com/hobbyking/s...er_Series.html
http://www.hobbyking.com/hobbyking/s...er_Series.html
http://www.hobbyking.com/hobbyking/s...er_Series.html
http://www.hobbyking.com/hobbyking/s..._EU_Plug_.html