Here are 3 I have used. Tolgar did Conker 3's weapon. Yorkshire profiles is our go-to for armour and base cutting. West York Steels supplied the material for Binky's new weapons, even if we haven't had anything cut by them. Tolgar has a cutter with angle compensation on it if you need that level of accuracy.

http://www.tolgarengineering.co.uk/

http://www.yorkshireprofiles.co.uk/

http://www.westyorkssteel.com/