actually shortly after i posted that i went to a petstore about 20 minutes away and they had one....i got lucky. that was the only place out of 4 that even had a size close. i'm worried about the heat though. i have a 100 watt heat light on the top and it's almost 80 degrees in the middle but it seems cool in there to me. i took her out and she feels cool too. i'm wondering if maybe i need a 150 watt? i have the heat pad on one side so i guess if she was cold she'd be on it...i just worry...