Oddly enough I recieved 5 seed pods from Penwie of all gnomes yesterday. After that event I really can't be convinced they're exclusive to wingstone. I'll start documenting drops from here on.
22.214.171.124 19:11, January 25, 2016 (UTC)
Yup, it's clear that Penwie also gives the special rewards. He gave me a Mint Cake (https://i.imgur.com/AuhSRJP.png)