The rubber case of my Solo 1 developed a split, so I looked for a replacement.  I found one, but it was for the USB-C version, so I tweaked it for the USB-A version I had.  I also added a loop so it could be attached to a keyring.

The body was reworked in OpenSCAD.  OpenSCAD wouldn't work with the lid, though, so I fixed it up with some modifiers in PrusaSlicer.  Likewise, the original button was too tall, so I shrunk it in PrusaSlicer.  If you download the .3mf file, you'll get all three parts, ready to print.

The SoloKey*.stl files are the original USB-C version without a loop.