I saw mdigiscout's model and the Airpod Pro version fit a little loose so I redesigned it. Changed a bit as well finding that the bottom pegs broke off easily so changed it to be full pegs. As well as altered the dimensions a bit and increased the size of the back pegs slightly.
I used superglue to secure everything together, without it things move around for sure.
The tolerances were pretty tight which worked for me on my MK3 if they don't work for you I can update the model to increase them.
Let me know if this works well.
The author remixed this model.