Thought about welding it. It's like pot metal. Figured it would be like tack welding a cymbal back together. Probably should have tried it.
But I figured I'd have to take it off (along with wheel) to do it right, and I found a good, low-mileage one on Ebay for $50, plus $12 shipping. New one is more than three times that much.
Might be peanuts to some of you guys. Not me.
I always do my own maintenance, lovingly and as cheaply as possible. My ride runs perfect, goes 75 miles every day that it doesn't rain or snow.
BTW, the sprocket inner ring broke off at 42,000 miles. I'm guessing it's really not all that rare. I'll post some pictures.