Battery Holder Module

This isn't a good name, but is the only mention/link i can find in my searches, where did this page go the lipo holder, uses the AA sized lipos (different voltage), did it die due to shipment concerns? Was 3D Printed mainly, need it for sharing with someone on discord...

- anyone know about this, found a bit on the rasp pi tablet, in the google presentation doc, but not much else?