There are a couple of batteries on ebay but looking £5000 to £6000 then the cost of fitting and coding it all in. The battery is like 450kg so needs so decent kit to lift into the bottom of the car. Without the coding issues it's simple to fit it in the car. Getting it to work is where I think there is a lack of expertise and renault don't seem to want to support much I terms of battery swaps or upgrades. If you can find a way to get it to work let us know.