Go on the net and enter bow scuff guards. There are several after market companies listed. One of them might have what you are looking for.
I don't ever remember seeing any boat manufacture advertising them, but maybe they do. Try Cecil Marine, they might know.
This is what I think of when you say bow scuff guard. A long guard that protect the front when you beach.
But when searching I also see this small on come up, that protects where the nose meets the trailer.