As long as the iPod was an iOS Device or an iPod Nano 6G, there should be a back-up file listed in iTunes.
Go to:
iTunes > Preferences > Devices > Device Back-Ups
That should provide you with a list of devices synced to the computer in the last 2 years.
This guidance is of course assuming you are using iTunes on a Mac. I'm sure there is a method of doing this on PC but I have no way of finding out for you.
Hope this helps you,
Happy Holidays