Thailand has had a long-standing export ban on D. pulcher, but I'm not aware of any other restrictions. I have heard that poor water quality in the Mekong basin has ruined datnoid harvest in Vietnam. That could affect D. pulcher, D. undecimradiatus, and D. quadrifasciatus. However, that shouldn't affect D. microlepis, D. campbelli, or the New Guinea population of D. quadrifasciatus.
This was posted by icthyophile....
I personally haven't seen any for sale by our community sellers in months.