The standard PCB laminate is FR4 1.6mm. If you intend to mill out the tracks then you do not need the copper coated with photo-resist
For higher currents you can use a thicker copper laminate but these are more expensive and take longer to etch. Soldering some wire to the track works just as well
Cheaper PCBs pased on a paper glass mix are also available and are easier to drill eg CEM/1. While not as strong as FR4 they are easier on machine tools and drills and can also be punched.
When drilling it is helpful to use a backing sheet of Alu foil coated SRBP board
for the drill exit this helps prevent drill breakage
For supplies you could try the us rep for Mega
http://www.megauk.com/cgi-bin/mega/l...ww.megauk.com/ http://www.vpcinc.com/Products/pcb.htm
If you are interested in some background on commercial manufacture look here
http://www.personal.dundee.ac.uk/~gjzcallo/