Need advice on 08 prius former flood car ecm programing

I got a 08 prius was fresh water flood. Car. Replaced about all computers. Took it t o Toyota. They got it to start. With the org. hybrid ecm and the engine controlled ecm. I think he was wanting t o get home. They called said it needed more time. Question is. Is a used engine control ecm program able at a Toyota dealer? Also have a used hybrid ecm does that have to set up for it to work also ? Thanks for any help