Here is a link to apply for a replacement green card I-90
Form I-90, E-File Application to Replace Permanent Residence Card
...
http://uscis.gov/graphics/formsfee/forms/e-i-90.htm
Who Is Eligible to E-File This Form:
For Replacing Lost or Damaged Cards:
o Your previous card was lost, stolen, mutilated, or destroyed;
o You have been a commuter and are now taking up actual residence in the United States;
o You have been a permanent resident residing in the United States and are now taking up commuter status;
o Your status has been automatically converted to permanent resident status, this includes Special Agricultural Worker applicants who are converting to permanent resident status;
o You have a previous version of the alien registration card (e.g., INS Form AR-3, Form AR-103, or Form I-151, all no longer valid proof of your status) and must replace it with the current Permanent Resident Card (Form I-551);
o Your card contains incorrect data (see "Filing Fee" below)
o Your last name or other biographic information on the card has been legally changed since you last received your card; or,
o You never received the previous card that was issued to you by USCIS.
Filing Fee:
$185 (an additional $70 fingerprint fee may apply) Note that when using this Form I-90 to correct incorrect data due to INS or USCIS administrative error, you do NOT have to pay the fee.
Initial Evidence and Supporting Documentation:
You may need to provide documents that support your application. After filing your form electronically, please mail the supporting documentation to the appropriate address as instructed on your Confirmation Receipt notice. Please be sure to attach a copy of the Confirmation Receipt notice or Form I-797, Notice of Action, (receipt notice) issued by USCIS to the documents to help USCIS match them to your file. See general instructions for Submitting Supporting Documentation.
For Replacing Lost or Damaged Cards:
Unless your card has been lost, stolen, destroyed or you never received it, you must mail your original Permanent Resident Card to the appropriate address listed on your Confirmation Receipt notice. Please retain a photocopy of the front and back of your card for your records.
If you have been automatically converted to permanent resident status, you must mail in your original temporary status document. Please retain a photocopy of the document for your records.