I printed that one myself. This is the model I used:
https://www.printables.com/model/286657-rak19007rak5005-case-for-meshtastic
They have a couple of options for purchasing one ready printed if you don’t have access to a 3d printer. 

 Ohh! I wondered because when I was checking your links in the thread, I found the schematic but not the actual checkout. That ‘splains it 😂

Thanks brother!