Does anyone use colored RJ45 connectors? I am teaching some children how to terminate and make patch cables.

See this image, I found these on ebay but the seller isn't responding. I am going to teach some children in a young tech class about networking basics and have them each make their own patch cable to use. I have some colored cat6a cable options but wanted to give them more customization. Does anyone know where I can source some colored RJ45 connectors?