If he's stressed, he is not going to eat. it is absolutely in the best interest of the animal for you to change the husbandry first and THEN feed, not the other way around.
Put him back in the rubbermaid (assuming its small, 16 quarts or so) with a single hide, water dish and leave him alone. Make sure you have him on heat tape or UTH with a thermostat and let him settle. Its probably a combination of things mostly due to stress that he isnt eating.
And as for the PAM, like I said before, there are multiple websites to get it from. I live in NY state and ran into the same problem. No, it may not be the right thing to do but I had to do what was best for my snake.