where to buy trasistors

[loose1]

I am looking where I can buy a transistor for my bridgeport. Its off of the acc board. The machine is a early 80's with a machine master control.
The Part # is ir-431 It controls the y rapid travel.
I can't find this transistor or a cross number. I bought my other ones from newark, but they don't seam to have one.
Thanks Matt

[mcphill]

try www.mouser.com