Below is the PN for the Mopar flares.
Genuine Mopar Wheel Flares - 82215284AB
The RAM trims that have the factory flares (wheel well moldings) have different fenders, so the OEM flares you see on those will not work due to mounting tabs that go through the fender.
I bought these from eBay, installed then removed them because they look silly with stock tires. When I get bigger shoes, they may go back on.
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Good luck, I hope that helped.