You can get the following from Casey at Winnipeg Reptiles (where you bought your Panther):
Roaches, super worms, phoenix worms, hornworms, butterworms, and crickets. Sometimes the hornworms will be too big for him, as he is still young. You can call Casey and ask what he is feeding the brothers and sisters of yours -- he is very knowledgeable and is always happy to help.
My Werner will eat crickets, butterworms and Phoenix worms. Casey can order those for you.
How are you doing with the rest of your setup?
Is 9:00 too late to call you tonight?