A spoke protector would not help unless it purely filled up the space between the sprocket and the spokes. The reason for the damage is the space existing
is too narrow for the chain to slide down between the spokes and the sprocket. and when I peddeled, it forced the chain down in between like a hammer and
wedge breaking the spokes. I could envision another sprocket without any teeth that was slightly larger to keep the chain from coming off the last biggest sprocket
I am not aware of anything like that existing ? ? ?