Battery shell - Source

Hi Guys.

Does anyone know where the SP140 battery outer shell came from?
I’m battery building for a different application and need to jig the shape a bit. This container material looks nice and modular from the pictures - or is it a custom extrusion?
Any guidance or finger pointing in the right direction appreciated.

It’s a custom extrusion that we designed.
The 1/2 size (2kw) battery has some extra room in the case if you are looking to add to it.

Can i buy only a bat.box without battery? Need two pieces 1/2 size.

Thx

I would also be interested in getting the shell casing for the battery case.

I am thinking about buying an SP140 and I have some spare 18650 cells from my electric bicycle build and would like to build a second light weight battery with them for my future SP140.