Thanks, Team.
No, they will not accept a 5D for anything, even cleaning, other than a mirror issue.
Appreciate your list.
I have already called local repair shops and found out the following. Sorry, should have been in the original post.
The repair on a 5D must be by a Canon authorized repair facility. Reason being is that when canon removes support for a model, they also eliminate parts sales. Authorized facilities must also carry a sizable parts inventory. So even small shops that do repairs in-house cannot do the work, because they cannot order parts.
One repair shop told me that canon used to have 50 in the U.S., almost one per state. However, they told me the camera repair business is in shreds compared to years ago, hence help is hard to find.
Again, thanks... still looking.