Where to find a fuel shut off valve?

[In The Ten Ring]

Always trying to stay 1 step ahead...

Since I expect (hope!) to have my cab to frame bushings in by the end of the week I want to get ready for the fuel line replacement. I want to put in a fuel shutoff valve at the tank behind the seat.

Where do I find one though? I haven't had much luck searching online.

I'd like one like this.....

http://thumbs1.ebaystatic.com/d/l225...hg-c2aKGew.jpg

I just plan to connect it with rubber hose and hose clamps.