It can be brazed or torch welded with cast iron rod, but either way the whole cradle must be heated first or it will just keep cracking next to the weld or braze. I'd take it to someone who does cast iron welding. They will be much easier to find than a replacement cradle with exactly the same dimensions. If you can't get it fixed, I have some mounting arms which are a two piece arrangement and you vary the distance between them with the size of the post, plus spacers. They were expensive for what they are, but they do solve a problem on occasion. -- Neil
I collect U.S. church and fire tower bells and research the foundries which made them.