ASI hit a homerun with this highly customizable case that can also be ordered preassembled. A mixbox edition is available too.
Those looking for an all-key box controller with the Smash community's preferred layout are in luck because of the HTangl.
This handmade beauty by 2nd Stage Creations is fairly customizable, with the star component probably being the wood.
This is a handmade mini all-button controller that can be altered according to your tastes and preferences.
The X8 is PXN's debut mixbox-style controller that sports some interesting artwork which is refreshing to see.
The MakeStick X Prime is a banger by IST Mall that is also available in a Knee Edition for Tekken fans and enthusiasts.
3D printers can make the mini Flatbox controller at home or simply order it preassembled for maximal convenience.
The Taito Egret II Mini Control Panel can be used with the Egret II Mini arcade cabinet or as a PC arcade stick (with the proper drivers).