Subtitles?

It's available on iTunes with English subtitles. It's under Billy and Buddy. Here's the link. https://itunes.apple.com/us/movie/billy-and-buddy/id767000734

It says it costs $12.99 to buy the HD version but you can also rent it for $4.99. If standard definition is good enough for you, it's $9.99 to buy and $3.99 to rent.