Not sure about in the States, but in the UK, there is a company that will sell you a wiring kit for your particular model of bike (wires, connectors, tape, etc. All for £22). You can then customise it to suit your particular needs.
I have never used them myself, but intend to when I rebuild my T120R.
Here is the url:
http://www.aoservices.co.uk
Many years ago, late 70's I think, a friend of mine painted his Triumph blue and decided that it would be a good idea to have all blue wires to match.....
I am not sure if he ever did get it sorted, because not long after, he bought quite a famous bike from the custom circuit at the time (called 'Jaffa Cake') and I never saw the blue bike ever again!
Shame Mr Mackey wasn't around at the time

Mark