I called the parts dept of the dealership that I just bought my truck from. The filter's in stock but the cover would have to be a special order.
The parts guy repeatedly asked me for my vehicle info so he could verify if it was the right part. I finally told him it was for a Ram and it wouldn't show up as original to the Ram.
Long story short, he said it could affect warranty and I should run it by their service manager.
I'm dropping the truck off there tomorrow for undercoating & rustproofing so I'll discuss it then...