I had my car there for other work that WAS warrantee work, not just the dash recall, so I dont know about a rental in your case.
Why dont you read that letter closer...I think it mentions a loaner vehicle, if not, call the dealership.
By the way, if you find a dealership that has successfully done the repair, please let me know!
Only talk to Kevin Carvinen (SVT mechanic) next time you go to AV Ford...he works m-f 6-2. Hope this helps.