Hi pjay9,
I get 8 pages with results when searching for "Lance dry rot". There certainly have been a number of threads on the issue (and not just for Lance campers); notably I can remember user "88Lover" posting his ordeal with the cabover repair.
Here is what I did:
Go to "advanced search"
Enter "Keywords" = "Lance dry rot"
Keyword Match = Find posts with all of the words in any order
Date Posted = Archive - over 1 year ago
Forum(s) = Truck Campers
Click "Search".
There are also several topics in the Truck Camper university.
http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/25966285.cfm