I tried to find a commercially made red over green unit to replace the tri-color/anchor light but couldn't find anything. I thought about making something but it ended up at the lower end of the priority list (which grew exponentially) during the refit last year. If there was a factory red over green with an anchor light available (LED) I would definitely install it. The ability to run the deck lights and the red/green at the mast head would add visibility and additional identification (at least to the small number of boaters that know what it means). It drives me nuts when I see a sailboat with both deck and tri-color on, but I can understand the desire to be seen, the red over green would solve the problem.
SV Laurie Anne
1988 Brewer 40 Pilothouse