If they are in the typical 2 pieces, a good welding shop can put them back together for you. Our welder had jigs to put them in so they lined up perfect. I'm in farm country, this is a common repair....
There are a few used parts dealers on the web...a couple come to mind, Keiters and Frys both in PA. There are others though...do a net search Im sure youll find more than enough.