I have an inground 30,000 gal. pool. It is probably 20+ years old. It has polymer sidewalls. 10 years ago I replaced the liner. At the time I had the pool light removed and did not replace it. Now another 10 years later it is time to replace the liner and now I want to install one of the newer Hayward pro logic LED lights. My pool company came in and removed the liner. Then they said that I was missing the part that holds in the light. They can't seem to find a replacement?? The niche has some numbers in it but most are obscured by compound where the electrical conduit goes. The numbers I see are something like "BCR-400" and BC fixtures. Does anyone know who made this niche?