Generally, there is no need to buy expensive sheet music if you have access to the web. Be advised that the quality of these tabs varies greatly depending on the skill of the person preparing them. I have found some tabs are actually better than the professionally produced books. So if at first you don't find what you're looking for, keep trying its usually out there somewhere. There are hundreds of free tablature (tab) sites on the web. Links to some of my favorites are listed below.