There are different types of controllers to play fighting games, and the types range from arcade sticks to leverless controllers (and beyond).
The Varmilo FK2 is a 14 button controller that also comes in differently colored Sea Melody and Sakura editions.
The Mu-1612 is a 15 button stickless controller made of aluminum, and it features a split PCB layout for modular upgrades.
The FS-MINI by Tbox is a mini controller that is available in lever and leverless editions. It can also come in preassembled or DIY formats.
You can choose the color of the small & light KBGM-H06M, which also features LED for its buttons and midsection.
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.