A WASD controller often has a combination of WASD keys on the left and arcade buttons on the right. Of course, there can be other variations as well.
JUANminiDIY or JMD Customs is a fightstick builder & woodworker from the Philippines with worldwide shipping.
The SallyBox is a mini controller with a layout that allows you to use it as a leverless or WASD controller.
AllFightSticks provides DIY cases in different sizes, such as the 15.5" Prototype Steel Aluminum Hybrid case.
Certain Deth is a Detroit-based outfit that provides custom enclosures and builds with key, button, or joystick directional inputs.
The Titan is loosely based on the Sega Saturn controller, and one of its many unique features is having a customizable encoder knob.
The Stress Pocket Arcade Fight Pad is a mini WASD controller with unusual angles that may appeal to you more than the usual layout.
This mini all-keys controller made of aluminum and acrylic can be ordered in leverless or WASD formats with various switches.
The 4TW cast-acrylic case by jonyfraze can be ordered in preassembled or DIY formats as well as different layouts and art.