Generate footprint for IC
A while back I created a tutorial on adding components to Altium libraries. You will very rarely find pre-made libraries, and personally I don't recommend using them anyway because the varying styles between libraries will lead to a very sloppy design.

The other option is to use the IPC-Compliant Footprint Wizard, which can be found in the Tools menu. With that tool you can take the values from the datasheet and generate your own footprint for the component.