Thanks so much for the information!
I went ahead and ordered the PAM from pangea (I needed to get gecko food from them anyway), I just hope it'll arrive before the boa does.
I will take your advice about wiping him down with the reptile remedy before I put him in the enclosure and if the PAM arrives before he does, I will spray his enclosure with that as well.
Thanks again with your input. Having this stuff on hand will make me feel more confident about buying snakes at shows as well.