lighting

I have an old anthony pools light, reading the numbers off of it it says use no. 20 wet niche type fresh water use. then use with no21 or 19la fixture housing- 120 v 500 watt max r40 lamp. i destroyed the fixture trying to get to the wires so i need a complete replacement fixture and light assembly. what do you recommend thats resonably priced replacement? thanks

I have this same lamp. Anthony Model 20. And I would also like to know what modern light would fit in the niche. I can’t seem to find parts for the model 20 anywhere. Just the model 30.