Best Answer - Chosen by Voters
You won't be able to find it on the internet. At the very least, PADI doesn't publish this information.
A PADI-Pro (i.e. divemaster, instructors, etc.) has access to this information via the PADI member website. The PADI-Pro will be able to look up all of your non-pro certification levels if you provide them your full name and birthdate. Now, I wouldn't give that information out on the internet.
I would go to a PADI dive shop and ask them to look up the information for you. While there, you can fill out the PIC form to get a replacement card. It will cost about $25 for the replacement card.
If all else fails call PADI 1-800-SAY PADI (800-729-7234).
Me (PADI instructor)