Ok, just got back from the pet store.

Sadly, they didn't have any ceramic heating bulbs or heatpad thermometers. I did get him a few new things, though. I got a smaller water bowl (which he can still fit in), a second hide, a climbing stick, and two frozen adult mice. I also changed the bulb in his tank from a UVB to one of those "Night" red bulbs (I know he can still see it), because the UVB wasn't getting hot enough. I'm going to order a heatmat thermometer off of Amazon today, but for now he has the light. Thanks to everyone for the suggestions. I'm planning on holding him for the first time at the end of July, and I'll be trying to feed him every week. The employee at Petco told us it would take a bit for him to settle in and start eating, so I'm not really as worried as I was.