Here's one that uses honey & nonfat dry milk in addition to the ingredients you names.

Here is a link that might be useful: Peanut butter balls

Here are some others that sound like what you requested. Especially this one but check out the others at the link below:

NO BAKE PEANUT BUTTER BALLS

Ingredients :
1 c. powdered sugar
1 c. extra crunchy peanut butter
1 c. Rice Krispies
1 tbsp. butter
1 pkg. coconut

Preparation :
Mix peanut butter and butter. Add Rice Krispies and powdered
sugar. Roll into balls. Make glaze with water and powdered sugar.
Dip in glaze and roll in coconut.

Here is a link that might be useful: Peanut butter balls

Heres one that goes over well with friends and family

1 cup karo syrup
1 cup granulated sugar
2 cups peanut butter (creamy or crunchy)
4-5 cups rice krispies

put first 3 ing. in lg. pot and heat thru till smooth then just add rice krispies and stir. I use a melon baller to scoop out my balls onto was paper and let them cool just long enough to handle and then I form my balls. Sometimes I even dip them in melted choclate. It is good either way and soooo easy.