I went out searching the internet for the recipe - nothing, BUT I came up with this idea.
Substitute canned pumpkin for the peanut butter in the Regular Buckeye recipe adding the spices you would normally put in pumpkin pie (or cookies). I bet if you get the right consistency you will have the recipe. The only thing I would be leery of IS how long could you keep them safely before they might spoil.
Good Luck