[Zope] nice icons

Hi folks, I'm looking for some nice icons to use on my zope powered homepage for representing different document types. At the moment I need icons for "pdf", "ps", "tex", "howto", "link" - but it would be nice to have others as well. I like the zope icons for "howto", "wiki" etc. because they're small and simple while still looking nice. I was wondering if there are other icons from this family out there somewhere, or if not, if anyone knows how to obtain a nice matching set of icons in a similar style. Thanks in advance, christian