I just had a thought while looking at this picture. I always just assumed that these new fixtures just had to be replaced, but from the looks of it, you may be able to just replace the element. Many of the wafer type LEDs are sold with a handful of wired plug adapters for various styles of 12v lighting applications. You could just cut the plug off one end and wire it direct into the fixture, and youre all set. Then if your new wafer ever dies, you're all set up already. Those little black plugs are pretty standard in the LED world.
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!