I know I've seen this discussed on here, and it's pretty much just a FAQ at this point, but somehow my google skills are failing me...
From the Tor FAQ:
9.2. How do I respond to my ISP about my exit server?
[link]
A collection of templates for successfully responding to ISPs is collected here.
This is probably what you want:
http://tor-exit.fscked.org/
-James