Hi, I am new to this site. I brought a house with a concrete pool. I sandblast the pool, and I'm about to plaster but I have a problem with the light. The light nitche is empty. Someone cut the light wire. The nitche size is 10 in diameter and 8 in deep. The pool was made by sylvan in the 70's. Can I buy a replacement light which would fit in the nitche? Please help me.