www.mouser.com

Mouser electronics is great. No minimum order! But shipping gets you $5-$6 on a $5-6 switch? ya gotta do what ya gotta do, git-er-done, and all that. Let me see if I can find you a part number. I got the catalog next to me so lets see here...good god they have alot of switches. They show them as on-off-(on) with (on) meaning momentary. Mouser pt. # 506-MTA106H, for example, is a spdt (single pole double throw) on-off-(on) mini-rocker. Start on this page and have fun. lol.
http://www.mouser.com/catalog/627/1290.pdf

-LAZ-