| I have found the best search for tabs and music books in any style of music is publisher Hal Leonard Co.
If wanting a specific song or artist , find if available by using the internet homepage of Hal Leonard :
1: Type "Hal Leonard" into an internet search
2 : Click "Guitar/Bass & Fretted" in left hand margin of Hal Leonard homepage
3: Scroll down to bottom of page and click "Advanced Search"
4: Enter the name of a song or artist into the Search,
and in the Select Category box choose "Guitar Bass & Fretted"
5: Click "Find"
6: Click the name of the song or artist on the next page's list
7: Click the name of the book on the next page's list
Repeat 3 through 6 above, but first click the "Product" button instead of "Song" button. For step 3 also try entering "All Categories" instead of "Guitar Bass & Fretted".
For just the chord progressions so you can write your own basslines, search "all categories" rather than just "Guitar Bass and Fretted". Many songs are marching band books for horns. | 
