Wayne,
Depending where the spring is broken, here is what needs to be done to repair the clutch. It is probably a solid evening or afternoon of work.
Detatch the clutch linkage from the throwout lever
Remove the mounting bolts and slide the engine forward a couple of inches, or remove it from the frame
Detach the throwout lever from the frame. There is a clevis pin holding this in place
Remove the roll pin holding the driveshaft to the input shaft of the transmission.
This should let you remove the clutch as an assembly. If a new spring isn't forthcoming soon, and the spring is broken near one end, you might be able to McGyver it by removing the short piece of broken spring, and replace it by some type of a collar, even a large nut that fits over the drive shaft to make up for the lost length of the spring. This is a desperation move though, as the whole thing will have to come out again when you get a proper spring for it.
You also want to check the throwout lever and bearing for excessive wear as well, and put a little grease on driveshaft where the throwout bearing and pressure plate ride.