I found the bottom lid from Laurent's Lab and modified it for my MMU2. The original case from Geekbox has a very long delivery time, so I found the upper part from Alec with a fan.
This is intended for snap-in, and so I can't use it with the already printed base.@My solution: I added studs, so it can be combined with the bottom of Laurent.
Need 4 screws M 2.5x15
I printed in PETG, 0.2mm with 20% infill.
It might be possible to use it with both bases now, but I haven't tested that.
The author remixed this model.