The standard Foldylock Forever holder loads from the top, which restricts where it can be mounted. I have a Lectric XP4 and found the perfect mounting spot, but it only works if the lock can be loaded from the side. Pair this with 1-inch (25mm) wide Velcro for sturdy storage.

The design is a little crude, so feel free to remix it. I cut a notch off the "top" to ensure the lock wouldn't rattle around while in motion, but I took a little too much off.

I printed this in PETG at a 0.2mm layer height with 20% infill and 4 perimeters. It came out incredibly rigid; 15% infill or fewer perimeters would probably be fine.