My favourite place to search for fonts is www.fontspace.com. They have thousands of free fonts to download. All you need to do is search for a style relating to your theme. You can even type the text you want to use and the site will show each font using that text, so you can immediately see what will work best.
There are of course many other sites, but a lot of them charge for downloading the fonts. Since searching many myself, and finding this one, I haven't found the need to look for any others.