For a true cut-on-contact style, I suggest Simmons Sharks and Magnus. If you go to the Simmons site, it doesn't show it yet, but they are making a smaller version of the Razor Shark this year called the Mako in 85 grains (and 100 grains). Magnus makes a 85 grain Stinger that is great as well. I think Steel Force and Sonic/American might have a COC that light, but I can't recommend them as I've never used them. In order to get more selection, you either have to jump up to 100 grains or shoot chisel tips.

Hope that helps a little.