Humm. No responses yet. Might be the same issue I had. If I understand the question, what I ended up doing to solve that or a similar problem was to measure the O.D. of the pipe with a slide-rule hardware-store “micrometer” and then go to Fisheries Supply in Seattle and walk the isles with that value and tool until I found a white all-around LED light on a short aluminum stand of the correct diameter. I can’t remember which brand it was (edit: Seadog brand), but I was able to drill out the two rivets that held the short pipe to the base, then slide the pipe into the “mast” extrusion on the boat. I pinned it in place with a set screw and then wrapped the joint with a few wraps of the self bonding “emergency” tape to seal out any rain or spray. The LED has worked well for two years now.
