The best way to get replacement connectors for the DMXking products is to buy them directly from electronics distributors like Digikey and Mouser. The DMXking distributors sometimes have a few spare connectors, so you can always check with them first.

MAX Devices

3-pin DMX port

https://www.mouser.com/ProductDetail/649-220008-C031B01LF

2-pin power

https://www.mouser.com/ProductDetail/649-TJ02715000J0G

4-pin pixel

https://www.mouser.com/ProductDetail/649-220008-C041B01LF

10-pin IO port for LeDMX4

https://www.mouser.com/ProductDetail/649-220008-D101B01LF

10-pin IO port for eDMX1 DIN and eDMX2

Breakout Block: https://mou.sr/3UpQBnn IDC cable: https://mou.sr/3Abtl5Q