Thesis styles are usually very specific to your University, so it’s usually not profitable to ask around for a package outside your own University. Since many Universities (in their eccentric way) still require double-spaced thesis text, you may also need separately to set up double spacing.
If you want to write a new thesis class of your own, a good place to start is the University of California style, but remember that it’s often difficult to produce a thesis that both looks good and conforms with the style that your Univeristy demands.
This question on the Web: http://www.tex.ac.uk/cgi-bin/texfaq2html?label=thesis