Bringing up an old thread. Do you have any pictures of what you had to do to make the Bedrug fit? There is a Bedrug out of a 4th gen for sale locally for a great price. If it's not that much, I will grab if for my truckI’m running the bedrug bed mat out of my 13’. It’s damn close, just the rear by the tailgate sides go up unlike the gen 4. I just cut mine to make it work. I think you will be able to make it work, but it won’t fit exactly at the end.
Dammit, wasn't even thinking about it earlier, but had a friend over with a 4th gen as I was changing his spark plugs. Could have just looked at his truckI ordered a bed mat from carid in early 2019 and I believe they sent me Westin from the previous model, neither responded to my email and have not and will not use them again. Picture explains the difference between the model years.
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