I used these, I welded in a nut on the trim ring and it came out pretty good and super cheap. I really liked the fact that I could basically get any 4.5” lights to fit in there.
https://www.amazon.com/NTHREEAUTO-Mo...3093849&sr=8-3
https://www.amazon.com/desgin-Passin...3093964&sr=8-1