Overhead Plugs for Topside Handrail Nuts

Feb 25, 2019
O'Day 23-2 Lake Keowee
Bought a 1978 23' O'Day and am trying to clean up the cabin and looking for the overhead plugs (caps?) that cover the topside handrail nuts. They're either broken or missing. Rudy doesn't have any.

Has someone found a decent solution?