Hi Ray
I just repaired the deadbolt on my 1995 Executive. I was able to make some parts from a couple of Schlage locks work in my old lock.
It appears that most, if not all, of the deadbolts on Monaco units were supplied by Schlage. I think that all of the deadbolts were the same at least on the pre 2008 units. I found some of them in a Google search for" Monaco rv deadbolt lock". There are a lot of responses. When I was looking I found one that advertised "Monaco Deadbolts". It was more expensive than most of the locks I found. However, it might have fit better.
Good luck!!!!
HStoterau