During the course of opening the pool, one of the Pentair lights fell out of its niche. I checked on the other one and it also was essentially unsecured. In pulling out the light, this plastic part fell out of the niche. In the first photo, there is a broken round piece that looks like it cracked where the screw inserts that holds the light. The second photo is of the back of this piece (along with the SS screw that was presumably trying to hold in the light). This doesn't resemble anything I can find on the Pentair site. Any ideas? I was hoping to find a replacement part.