phpld design forums http://www.phplinkdirectory.com/forum/forumdisplay.php?f=12 everyone who makes templates usually posts about them there, so that would cover most DP people as well.
www.phpldtemplates.com www.phpldtemplates.info www.phpld.us above are the three is use, and most of them post on the phplinkdirectory forum so i find out regardless.
There are 2-3 at http://www.web-designers-directory.org/phpLD-template.php but they are very oftenly used, but yes a moderate change in it makes it look neat,clean and good looking.
If you are looking for some different styled template (not oftenly used), here you go http://www.FuturisticArtists.com/demo.html Free template for phpld 3.06