We just released a CC3 Version of the Vintyri (TM) Fill Styles Collection. Assuming that you're talking about raster symbols (112 in all), you'll find some included.
If, on the other hand, you're looking for CC2/CC3 vector symbols, I believe there are some in our old OGL 3.5 symbol collection (1,700 in all).
Both sets are free for personal and commercial use and are released under the Open Game License 1.0a . For more information, check the Vintyri Cartographic Collection option at:
http://www.vintyri.org