You should be able to go to lenovo's web page and find the software to download. Or you can go to IBM's webpage and search it there and it should redirect you to the correct lenovo page.
You can download drivers from Leveno but you can't get the OS. Secondly, it's twice as hard restoring without the CD. Laptops are manufatured in 'series' and are coming off the line in multiple configurations for the same 'model' number. The support sites for drivers, lists all the drivers but never associate the series to which they apply. So, choosing a sound driver, video, chipset, etc... from 3 to 4 choices is a load and try process. Not sure about Leveno, but try this site to buy the disk. Usually run about $50. I don't understand why people always loose the CD's that come with their PC? restoredisks.com
http://www-307.ibm.com/pc/support/site.wss/MIGR-59173.html Not sure if they are still orderable for shipment to a customer, else you may be able to send in hdd for recovery...