Jetman
kiwifarms.net
I personally would recommend an AmiiBrick for displaying any of the Sonichu, Rosechu or CWC custom figures. I am satisfied with them.
The AmiiBrick is good; it functions as stated; my Amiibo figures fit snugly into the bricks, and the bricks attach well onto my Lego plate and bricks.
All in all, for a good method of storing/displaying your original and/custom Amiibo figure(s), I would personally recommend one or more AmiiBricks, so they would be less likely to fall off or out upon impact.
There is room for slight improvement to make them more flat on the sides. And the top portion can be better flattened and the pegs aligned to better make that sandwich between a 2X2 or a 2X4 on top, the brick(s) or plate on the bottom, and any bricks around the putter sides of the AmiiBrick.