Call Bruno’s shooting supply in Phx. They sometimes ship powders that they have plenty of and they’ve had some N565 the last few times I’ve been in there.
I've got 6 1-lb bottles of H4831sc. 3 lot numbers... im up in Rock Springs Wyoming if you ever make it this way. If a trade can be made I'm looking for the usual H1000, RL26 and large magnum rifle primers.