The replacement fixtures I bought on Amazon mostly failed within a year: Kohree 12V LED RV Ceiling Dome Light Fixture, RV Interior Lighting for Trailer Camper with Switch Natural White
https://www.amazon.com/dp/B00ZR7WT5U..._5i4VBb6DKVGTD
Luckily, I had kept the original fixtures and reinstalled them and just replaced the bulbs: Grv T10 921 194 24-3528 SMD LED Bulb lamp Super Bright Warm White AC/DC 12V -28V Pack of 10
https://www.amazon.com/dp/B00EDFM5QU..._am4VBbJ4A25QN
They've been installed for a little over a year and have held up great, even with five months of continuous boon docking.