How do I acquire the Go Ropin' app for my Ipod Touch?

I recently found a section in Spin to Win rodeo magazine advertising a team roping game for the ipad, iphone, and ipod touch. However when I clicked the link to download it from the apple website a message appeared informing me it was no longer available on the american market. If anyone can inform me as to how i can get this game I would greatly appreciate it.