Best place to purchase OEM Gen 3 Hybrid battery?

After doing it now three times with an OEM battery on both the regular Prius and the Prius v, it's as simple as disconnecting the 12v, removing the trim panels, taking out the HV safety plug, disconnecting the two terminals for the HV battery, unbolting the battery, and then removing it from the car. Once out of the car, you swap over a few computer boxes. That's it. Then you reinstall. If something goes wrong, then you probably because you weren't very careful. It takes me about 2 to 3 hours to replace from start to finish.