So far i've found
Transmitter and Receiver: http://www.giantcod.co.uk/gianitcod-24g ... 03779.html

Motors, Batteries and Charger all from 2 drills: http://www.argos.co.uk/static/Product/p ... 418778.htm

speed controller: http://cgi.ebay.co.uk/2x-Marine-50A-Spe ... 2556cfba92