contact your employer regardless of the possibility of animosity, he is required to provide you a W-2, if you lost the first one he can charge you for another, bit the bullet and contact him
If the company happens to use a payroll processing service then you *might* be able to get a copy directly from the accountant or payroll processing company that handles the company payroll, but that's a big maybe.
You can get the info from an IRS transcript but it might not be available for another 6 months or more.