A few things
http://www.terminalsupplyco.com/
The Breaker is Part Number CB3-SM-120
The Gold Fuse Box is JEF-531D
Very nice company to work with.
They have ATO Fuses ( CB-MAX-40 is a Type 1 Circuit breaker that appear similar to the ones FIRST uses)
They also sell all all kinds of bolts but you can get those from just about any hardware store.
My Local Home Depot carries Lexan in various sizes but a google of "Polycarbonate lexan" will get you some other dealers.
PWM wires are just hobby shop wires they use in RC aircraft. Everyone carries them or you might try Tower Hobbies
http://www3.towerhobbies.com/cgi-bin...?&I=LA7482&P=1
motors will be a bit more of a challenge. at leas for another week or two, if they are available normally, they may be tapped out since we're still in build season.
Steve Alaniz