Here is this week’s free royalty free music clip. It’s actually just me practicing my blues chops over a bass line and a drum pattern from Strike (drum plugin from digidesign).
There’s no real ending for it but there’s enough of it to edit and and use what you need:

funky_blues_preview.mp3
Right-click on the link above (control-click on a Mac) and choose ‘save target as’ from the menu that pops up.