When I bought my boat in 2003, all of the black rubber bumpers under the cockpit lockers, and the two on the companionway hatch, were totally shot. Thinking these would be hard to replace, I roamed Home Depot and found some washers that I thought would suffice. They were ok, but not quite right. On a hunch, I called Hunter in Florida. Bingo! They had the original OEM bumpes in stock. I ordered 25 of them @ .49 each plus postage and had them in hand a week later.
If interested, call Hunter at: 1-800-771-5556 ext 3015. Tell them you want Item 1000190, Bumper Black, 771-RW (Large Bumpers).
Hopefully, they have some left as they work well!