Here are some free ones:

Rachel Woods LDS Clip art: http://lds.about.com/library/gallery/clipa...ry_subindex.htm

Christy's LDS Clip art: http://www.christysclipart.com/index.html

Then for regular free clip art I like this site: Cool Archive; http://www.coolarchive.com/clipart.php
There are a few on this one that are free: Cute Colors; http://www.cutecolors.com/