I can’t imagine the drugs used are still under patent, so if the Euros can’t in good conscience sell them for executions, why don’t the capital punishment states just form a corporation, and build a small plant and make their own for sale to the DOC in each state? Easy tech, and it’s not like you need tanker cars full of the stuff.
Even so, like the other poster I can’t figure out why they don’t just do a couple hundred cc’s of opiate. Half the guys are in there in the first place as a side effect of their effort to GET opiates, so they can’t very well claim it’s cruel. You could even use the street version. Who cares if it’s cut with rat poison, what’s he gonna do, die?