Found some other models, but they had frills I didn't like or didn't have proper relief for the cable that exits out the back of the streamdeck forcing an ill fit or a kinked cable that could damage the streamdeck over time.

Just a flat base for ease of printing. Add adhesive rubber grips to base if you like. I am undecided myself.

[Update]

Added another version with some rounded edges. On the original I found the upper corners a little annoying in use. I just hit mine with a file and that was fine, but I figured I would update the model for those that may prefer that version.