Sorry to hear of your loss. I can imagine it was frightening at the time, and is now saddening. Wonderful that someone has a replacement. I imagine with a little work, you could put many mast/step plate combinations on the boat. A little trimming or a few inches of spacer beneath the step plate will fit many masts. However, it looks like you have an option already. That mast looks pretty cleanly bent. You might send a picture to a repair yard to see if they can cut it and repair it. It would likely cost a fraction of a used mast.
For curiosity sake, what failed on that lower shroud? How is it attached?
Every season, we see a few catastrophic or near catastrophic equipment failures, and in most cases, a 5 minute boat inspection of pins and chainplates prior to casting off would have found the problem. This is especially true of boats kept in slips. I bet trailer sailers handle their rigging
more often, so they get a chance to inspect the equiment more often!
Thanks,
Andrew