I don't know that you can get one. They have adequate bedding for the number of people allowed per room (ie, a 1BR sleeps 4 - one king + one sofa bed; 2BR sleeps 8 - one king + two queens + one sofa bed). I agree with the previous poster there is no room for a rollaway except right in the middle of the LR, where the sofa bed opens. There was no room in either bedroom for even a twin mattress.