For those making pine cone bird feeders and otherwise dealing with peanut (or other tree nut) allergies, I've mentioned using soy butter before. The deal with the soy butter, however, is that... well, it doesn't taste the greatest, really.
Now there's something else on the market... it's called SunButter and it's made from sunflower seeds. This stuff actually tastes good.
Might be something to try. Especially if you already love sunflower seeds.