There are various companies offering custom racquets. Some, like Angell tennis, let you choose the specs of the frame, such as weight, balance, head size, and more. Like Wilson Tennis, other companies also let you choose the colors and style of the racquet, but not the specifications. Then there is Dahcor tennis, which lets you do a bit of both.
https://tennisnerd.net/gear/racquets/custom-racquets