OK- here are the links you need:
Circumstitions has pin up style nudes with a few close ups... not very many erect pictures though- so the idea that it LOOKS very similar to a circumcised penis when erect is not really well illustrated:http://www.circumstitions.com/Gallery.html
Carlquist has art nuded in black and white... he has a naturalistic approach to the human nude- no tan lines, no waxing, no circumcision in a natural setting with no powerlines, machines etc.http://www.naturalmanphotos.com/bio.html
Noharmm has a good still and a good animated picture:http://www.noharmm.org/anatomy.htmhttp://www.bigkugels.com
has some really funky vintage nudes and it becomes very obvious that a few decades ago circumcision was not the ONLY american way.
Of course all of these links carry the warning that they will show NAKED MEN.
Hope that helps- Love Sarah