You should be able to di-cal at any MFA co-op or any other farm co-op. I have found here in Mo that the tractor or commercial farm supply stores usually do not carry it.

If you areusing this for a minerial lick, be carefull with the dried molasses. check your baiting laws. Here in MO I can put all the salt, trace minerial, and dical in the ground I want and hunt over it. But the minute I add dried mollasis it becomes baiting.

Not trying to tell you what to do, just giving you a heads up.