Try here:
http://www2.standardandpoors.com/portal/site/sp/en/us/page.topic/ratings_sov/2,1,8,0,0,0,0,0,0,0,3,0,0,0,0,0.html
Good luck to you with your investments, but be careful. If you're giving money to banks, sovereign risk shouldn't be your main concern. At the very least, the very...