Maxx Tech is a gaming peripheral company from the UK that stylized this enclosure with its own twist that may appeal to you.
The ABC Akecon is a controller by the Akihabara Base Camp—a news site that covers the action packed Tokyo neighborhood it's named after.
The Mayflash F700 Elite is a wireless arcade stick with Sanwa parts, customizable art, and many compatibility options.
The KBGM-H08 has Sanwa parts, and it allows you to pick the colors of its joystick, buttons, top, and bottom.
The LightFox (or Light Fighting Box) is a feature-packed mini leverless controller that refreshingly comes with optical switches.
The Mayflash F700X is a multiplatform arcade stick that is wireless and accepts custom art to represent your taste in life.
The R4's slanted layout has Sanwa buttons, and its Sanwa joystick can have a Sanwa bat or ball top. The R3 and R2 editions have less buttons.
The Reversal is not just another Flatbox-based controller. It's buttons are angled in a way that should give you wrists an ergonomic slant.