First, you need to acquaint yourself with the "search" option at the top of the page.

But...
1) Ebay
2) After search to diagnose, antennaworld.com
3) More info needed. (Manual or auto) You need a repair manual or CD.
4) Click on "fastlane" at the top of the page.
5) Replace your glowplugs. That should do it. If not, replace your relay.