2015 Infiniti QX56 - Parts help

My 2015 Infinity QX60’s Driver Side Mirror was missing the bottom cover part while I’m driving. The Infinity dealer said they do not have that part,they are selling the whole mirror only for $ 475.00 !
How do I fix my side mirror without buying the whole expensive mirror ?

Local junk yards or do a search on car-parts.com.

does the bottom part return when the car is parked?


Check out these at Rock Auto