Dougrainer, fj12ryder, and mbopp, thanks for the replies. Dougrainer, especially appreciate all your behind the scenes insight!
Well, I just got a call from the service rep at our local dealer. He said Lippert approved new seals and backing plate brake assemblies for all four wheels. That's the good news.
Bad news is the brake drums are also scored and worn unevenly from all the grease. The brake shoes are like new in terms of thickness---as they should be, since they've been well lubricated--lol! Anyhow, the dealer doesn't have the capability to turn drums. I guess they replace them vs. turning them. Lippert did not approve any action on the brake drums other than cleaning.
We'll see how it goes. The dealer's pulling for me, but ultimately it's Lippert's call. If Lippert says I need to foot the bill for the brake drums ($400-$500) due to it being a "wear" item, well . . . I just may ask them to put it together with just new seals, new backing plates, and old drums . . . and put the $400-$500 towards some new Kodiak disc brakes ($1500 for everything at etrailer.com). Got to put safety first.
I may have some "like new", 12x2 backing plate brake assemblies for sale next week. Stay tuned.