Hello and welcome to BYC! Glad you joined.
I have no idea where you can purchase fertile goose eggs for incubation. Hopefully, someone will come along and point you in the right direction.
Good luck.
Scroll through the forums at top of page and click on when you get to Geese. Sorry I don't know anything about them except all the NON-migratory Canadian Geese literally stop traffic.
Welcome to Backyard Chickens!We are glad you joined the flock! BYC is a helpful site providing all of the information you need to know about poultry! There is always space for more members on the BYC roost! Ideal poultry is a hatchery located in Texas that carries geese but not hatching eggs. Otherwise, I would recommend Ebay. Hope you enjoy it here as much as we all do!