I made a mistake and got rid of my CITRUS BALL CACTUS, I have been buyi…

I made a mistake and got rid of my CITRUS BALL CACTUS, I have been buying up the extra seeds but it has not come up. Does anyone know if there is a way to make it by crossbreeding? Got rid of my Citrus Reptans too. Can it be made or do I just have to wait till it comes up again?? Help.