Need royalty-free clip art--Jitterbug, swing dancing, etc.

Hi, I need royalty-free clip art--Jitterbug, swing dancing, etc.

I have a cleaning process called The Jitterbug, and I'm looking for a graphic or clipart to use in business mailings.

I thought someone here might have a source for royalty-free clipart. Inexpensive is good, totally free is better.

I've looked into two membership places, Freeze.com and animationfactory.com, but neither has the design I'm looking for (though both sites are very good otherwise).

Thanks,

General Tsao