Finally my P-touch series Brother Label Maker has a wall-mount holster. Specifically, this was designed to accommodate the P-Touch 2030 and it fits very nicely. I opted to make it print in to parts that are then joined by two M3 bolts.

I designed it in two parts for printability, as I didn't want a to have to print any supports. Each side can be printed laying down on the outside edge of the holster. This way, both halves will print well, without supports. Lining up the holes can be a little hit & miss, depending on your printer. I ultimately opted to just drill through one of my screw holes to make it fit better, but a high quality print shouldn't need this and I've printed a few of these and only needed to drill through once.