Could not find what i needed so I created my own. It's a 1x3 gridfinity storage for a BT189 Battery Testing device. I made this using the gridfinity tool to be found at https://gridfinity.perplexinglabs.com and then created the space for the BT189 with https://www.tinkercad.com

Thanks to https://www.printables.com/@HLW_22496 who pointed me in the right direction. I couldn't use his files on my 3D printer but he gave me the idea of making my own with the above mentioned tools. 

Printed it with KExcelled PLA 0.2 mm on a Kobra 2 Max from Anycubic. Infill 5%.