Max number of choices in bundle

Hi. I’ve got a bundle made up of 12 cake varieties. I need to limit the amount of choices a customer to make within the bundle to just 3 different cakes, totalling 6 products. So they can’t select one of each cake to make 6, it has to be a maximum of 3 variants due to how long they take to make.

This doesn’t seem to be possible currently unless I am missing it. Is there any chance it can be added?