Keith Lewis,
They are Remington 209-4's.
I do actually get mine at the local Wal-Mart, they have to order them for me and I buy a brick at a time somewhere around $22-23...
If they can't get them for you, you might have to find a store that caters to reloading especially - shotgun reloading.
I have not tried to find them on-line because of the cost to ship...
Let me know if you have any luck...