This thread:
Punch Art
has a gallery link specific to SU punches.
A couple more links:
Punchart 1
Punch Art 2
I found this by googling "punch art." Some of these are absolutely incredible. You seem to need to register for a free trial membership to view the pdf instruction sheets full-size but it's worth the time, trust me.
Donna Bobbie Punch Art
There are also several editions of "Punch Your Art Out" books that you might be interested in.