Aqua Signal Bi-Color Navigation Light

I tried to get this light through West Marine and they no longer carry the combination red/green series 40 running light for some reason. They carry most of the other series 40 lights. I have a 38' sailboat which came with Aqua Signal 25 series navigation lights. The 25 series are cheaply made and I've had difficulty keeping them working. The double festoon bulbs in the Series 25 lights sometimes come loose in rough seas. I decided to upgrade to the Series 40 lights because they have a double pin bulb socket and the bulbs lock in tightly. The $43.00 price I paid for the bi-color through Amazon was a great buy.