Find a machine shop near you, 20 minutes, a torch, a tap and a die and your back in business. Cheaper than a new one, I've heard tell their like $150 or more. Finding someone who can fix it for you again next time, priceless!
mine broke the same way on one of the very first jobs with it. dead peice broke up and a chunk hit handle. (I had told ground person to move away ahead of time).
drilled mine out, drilled a hole in shaft too, tapped threads, inserted bolt (not super tight) and it has been good for several years(?) now.