Unfortunately, I can't find one.
I once saw Miss Piggy Candy molds, and I wonder if the store still has them. I saw a whole figure mold of Fozzie there. If you want, I could aquire one for you. If you (or I) can find whole figure of Kermit and Piggy, However, You could fill it with Marzapan and have someone paint it with food coloring. It won't last, but it's the best I can think of.