Possibly some players will sell them after a while. Alternatively buy the chefs pack as JC said he'd add new world gourd to it, just doesn't seem he updated the store description for it.
Have one planted now with gardeners shovel. So Popham is going to have either red bell peppers, green bell peppers, or pumpkins soon. I am crossing my finger for red bell peppers. Once I have a lot of which ever gonna go mad with planting them.