Don't use lipo in the Tx, use LiFE battery. This is what I use
http://www.hobbyking.com/hobbyking/s...%20transmitter
There is an official Futaba battery but not been able to find it. Part number is in the back of the manual.
You can get the same receivers that come with the transmitter from here
http://www.rccarshop.co.uk/index.php...hv-2-4ghz.html
I'm sure there are more options for you, but found these with a well known search engine.