There is usually a selection of Metal fabricators in the yellow pages, or indeed, you can google 'Metal suppliers in Norfolk'. If you want a reputable supplier in Norfolk, talk to Terry Miles (Toxic 2, http://www.toxicrobot.co.uk/).

As for batteries, I'd recommend Overlander (Google: Overlander batteries), you should be able to find a selection of NiMH batteries which are used most frequently in feathers. I use a set of 3000mAh batteries in my robots, they will suit for most FW's.