I think OP has 2014 non-USA model,
see link
https://partsouq.com/en/catalog/genuine/unit?c=Mazda&ssd=%24%2AKwHc6PnWh92gmaSqpKbl3oSQsLep2Nfa28nayoqK qLDckY6Y99_bh4OOha7eo9qEgOvfkYGEgq-BhtXH0ofdqNzW3gAAAADJFDCj%24&vid=1421364339&cid=2343&uid=28073&q=
click on 50-161 for driver side and 50-151A for passenger side
you can buy them here:
Driver Side
https://www.tascaparts.com/oem-parts/mazda-molding-bracket-kd4550164
Passenger Side
https://www.tascaparts.com/oem-parts/mazda-molding-bracket-kd4550154
you can see the covers in the youtube video
see link
https://partsouq.com/en/catalog/genuine/unit?c=Mazda&ssd=%24%2AKwHc6PnWh92gmaSqpKbl3oSQsLep2Nfa28nayoqK qLDckY6Y99_bh4OOha7eo9qEgOvfkYGEgq-BhtXH0ofdqNzW3gAAAADJFDCj%24&vid=1421364339&cid=2343&uid=28073&q=
click on 50-161 for driver side and 50-151A for passenger side
you can buy them here:
Driver Side
https://www.tascaparts.com/oem-parts/mazda-molding-bracket-kd4550164
Passenger Side
https://www.tascaparts.com/oem-parts/mazda-molding-bracket-kd4550154
you can see the covers in the youtube video
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