First of all you would want to protect yourself from identity theft. Here is a link that could provide you with some helpful information:
Second to get another W-2 you could either contact your employer ( in which they can reissue you another W-2 but may charge you a fee) or call 1-800-829-1040 and speak with an IRS rep who can provide you the W-2 information. Here is a link for more information on that:
Hope this is helpful!