Nissan Leaf Battery Replacement Alternative To Dealer?

[HereOnThePrimalEdge]

Does anyone know of a mechanic experienced in replacing and possibly upgrading a battery with longer range in a Nissan Leaf?  I think the Hawaii dealer price is currently around $15,000, more than the car is worth.  I’ve read about mainland shops that will use a non-Nissan battery, and not charge the dealer repair rate.  I’ve also watched a video of the process and it doesn’t seem that complicated, especially if someone has a lift and knows what they’re doing.

Any leads?