I was at my local grocery store the other day and found Olde Style Fresh Ground Peanut Butter in 1 lb plastic containers. It's 5g total carbs, 2 of which are fibre. No added salt or sugar. The ingredients just list U.S. selected fresh roasted peanuts.

It's very firm. The container says to stir before using. But there's no way you can stir it. Can't even spread it on anything. It's kinda crumbly. It's consitency almost reminds me of a peanut butter fudge I used to eat as a kid. Which made me think of trying the following...

equal parts peanut butter and cream cheese
however much peanut butter you use, use 1/4 as much butter
cocoa, splenda & stevia to taste.

Mix it in a food processor until blended well. Form into balls or whatever shapes you want and chill. They're very nummy. I know these aren't very precise directions, but I'm kind of a fly-by-the-seat-of-your-pants type cook.