I need help finding a case mod part

Ok, so i went to radio shack to look for a key/key switch assembly and they didnt have them :( . I looked everywhere...all of the drawers and shelves and even asked the guy up front (when i asked him he looked at me like i was some kind of idiot) Anyways...i already made a thread to get instructions on how to get it wired and see if it were possible (click Here to see that forum)
Now what i need is your help to figure out where i can find a KEY SWITCH to wire as my power "button" for my computer. ( i would like to find a place thats local, i live in a big city so almost all chains are around here)

Your help is appriciated
"Fred";)

http://store2.automationdirect.com/p.../L_GCX1420.jpg

Momentary key switch.. Spring return from right..

$ 13.00

www.automationdirect.com

22 mm metal, 2-position, maintained, key-operated, 1 N.O. contact block. Key may be removed in all positions.
Note: All pushbuttons include operator, mounting adapter, chrome plated alloy bezel, indicating light (if applicable), and contact block; shipped unassembled. Order legend plate separately.

BTW part# is GCX1420 :)