not to be a prick... but you should at least attempt a little research first before giving up. its a common mod so there are guides up everywhere. leds are so commonplace that even radioshack and some other hardware stores carry them standard.
http://www.google.com/search?q=replace+leds+in+keyboard&hl=en&source=hp&aq=f&aqi=&aql=&oq=
a little research goes a long way... you might not find your exact keyboard model but led sizing should be similar.
http://www.google.com/search?hl=en&source=hp&q=buy+leds&aq=f&aqi=g8g-m2&aql=&oq=
have you tried using google?
---
i have a digikey catalog myself for ordering switches, leds and other such small devices.