  Everybody should check out a free font site I found called urlLink dafont.com . All of the fonts are categorized so you can easily find the font you are looking for.
Also all of the fonts are ok to use in Quark and you shouldn't have a problem embedding them in a pdf. If you are trying to find a certain font there is a forum in which you can post a picture so someone else may help you identify it. Overall this site a very good source for fonts that aren't used so often and the categories make it very easy to navigate. Almost all of the fonts are mac and pc compatible. 
