Planck PCB Rev 6 is up for sale! Hot-Swap (50 USD) and Low-Cost (30 USD) configurations available on multiple stores! : r/MechanicalKeyboards
How to Replace Keyboard Switches on a Hot-Swap Keyboard - Switch and Click
Custom OEM ODM Service RGB Hot Swap 100% 100 104keys 108keys Qmk Via Mechanical Keyboard PCB with ISO ANSI - China Keyboard PCB, Keyboard PCBA | Made-in-China.com
Hot swap wireless keyboard PCB, Bluetooth 5.1 / USB wired dual mode keyboard
Amazon.com: YMDK GH60 GK61 RGB Hot Swap Independent Driver Tyce-C ANSI Mechanical Keyboard DIY kit Plastic Case CNC Aluminum Case Plate PCB (Plastic Black GK61X Wired) : Electronics