Why bother? The guy should fix his site. http://contrastrebellion.com/

Evernote's Clearly, also a browser plugin, that runs locally unlike Readability, gives you similar presets, but also lets you set your own CSS:

http://evernote.com/clearly/

Here's an example of Clearly typeset with all the Adobe Source fonts: https://dl.dropboxusercontent.com/u/2071994/Clearly%20set%20...