Argo dealer and wrong part=no Sunday run

[eightwheeler]

Hey guys, the Argo dealer gave me a different size sprocket/brake disk, i had no idea it was different untill today when i tried to put the new one on and the chain did not go on, the old one is a 15 tooth sprocket and the new one is a 14 tooth, does anyone have a spare 15 tooth kikin around?