I think we’re jumping the gun here. 9 and 10 can are nice filler episodes, but entirely irrelevant to the bigger picture. You can establish in the crawl that the Mandalorian is searching for others of his kind, and he is transporting a passenger to a planet in search of finding one. Then start with Episode 11.
Mando’s line in the cantina could be repurposed at some point to explain how he got Boba Fett’s armor. The only continuity issue is the ship being wrecked, but the Falcon’s hyperdrive got crummy between 4 and 5 so I don’t think that matters.
This is certainly what I’m leaning towards at the moment.
Current Project: The Mandalorian Episode 1 - A Vergence in the Force