Halfdozen

Looking to replace my chrome mirror covers for some Northsky Blue Metallic covers. Have contacted two different DFW dealerships and both say they aren’t available. I have also been searching on eBay with no luck. I know they come stock on the higher end models. I have an LT, but thought that all mirrors no matter the trim would be pretty much the same. Am I missing something here? Has anyone else run into this issue? Thanks in advance for the help.