Hiya! Welcome! There are a few people and sites that make all the hard-to-make bits pre-packaged. I've literally just started entering my first featherweight after a year of building. My advice as a new builder would be get to some events and just keep it simple at first, there's a lot more to it than I first realised.

For motors / wheels

www.gimsonrobotics.co.uk
www.robochallenge.co.uk

Batteries - ebay

Speed controllers -the range is endless and everyone has their fav's, I use these

http://www.technobotsonline.com/moto...ntrollers.html

erm and my transmitter / receiver is these

http://www.giantshark.co.uk/product/...e2-transmitter

This is all uber budget but thought it might help!

Dave