The other brackets I found would not fit the Ender3 Neo gantry so I made my own.
2x M3 screws keep the accelerometer in place, the holes are a bit tight so they'll cut their own thread through.
There's a hole for another M3 screw to tighten the whole thing to the gantry but I didn't need it, it fit snugly
The author marked this model as their own original creation.