The ritter is 3/4 flat grind, that is the closest you'll get without having it modified I believe.
I also agree with the others, the griptilians do slice very well for how they're made. Mine isn't better than my para 2 though, I have a crazy thin edge on it. It shaves hair when its dull its so thin lol. Not really but it still slices boxes equally as good if not better than a proper razor blade.