I would like to fab a chain tensioner that is spring loaded, similar to the monstarcraftsman version and I am wondering if anyone knows where to look for the sprocket and spring. I work in a steel mill and I can have pretty much anything machined as far as brackets are concerned. I can get things slotted, drilled whatever but I am not sure where a guy would look for the other stuff. Any ideas? I like the idea of something with a spring that keeps tension when going between gears. I have seen the thread with the skateboard wheel. It is killer but not really the look I am going for.