They sure look like what I expect Irian Jaya/Coastal crosses to look like.

This essentially means that they are intergrades, and that particular cross has not been valuable to breeding, despite still being awesome animals. If you ever do breed them, make sure you stress to any purchasers that the offspring are intergrades so that they don't get passed off as pure anything.

Great looking little worms you have I recommend investing in a snake hook if you don't have one, I'm a huge fan of Midwest Tongs brand, their basic hook is a fantastic tool. It makes dealing with bitey baby carpets much more pleasant.