I had some spare time today and headed down to Tractor Supply. Unfortunately, all of the clutches there were too big. I've found one or two that would fit on the internet, but they appear to be custom made and cost over 100 dollars, so that's not really an option for me. I'm still keeping an eye out for some on the net, but I'm leaning towards welding a sprocket on the stock clutch right now.
PD