I found a site awhile back that had a couple different ones.
Haven't found it yet but here are some.

http://billieshelppageforpainunderstanding.org/pc1.htm

http://www.endo.com/pdf/resources/Un...Assessment.pdf

http://www.associatedcontent.com/art...l_of_pain.html

Ok this one has a bunch of links - they are in PDF format- so it will download and open in your adobe or other PDF reader.-
http://www.partnersagainstpain.com/p...ales.aspx?id=3