I recently made a battery enclosure for my eskate out of Kydex. I made a buck from wood to represent the shape I wanted at the end then used 0.080 inch thick Kydex, heated it and pressed it over the buck.
Here is the first video about making the buck. I will be posting the rest of the series shortly.
I also plan on making an enclosure for my VESC in the next few weeks. I could potentially make these to sell if there is interest. The Kydex is much stronger than a standard ABS enclosure.