Hand/thumb Warmer Switch Housing

Went out the other day to wash the old girl and found the OEM switch housing broken off. 2013 Max XT. They are secured to the bars with one bolt that also appears to be where a mirror would be mounted. Appears that the plastic is kind of rotten where the bolt goes through it and it simply just fell off. Anyone else have this issue? Any good fixes out there? Does warranty cover it?