Pam - Have you received the Summer 2006 Vacation Magic yet? If so, look on page 24.
It mentions replacing the beds and sofa beds at the BCV during the next few months. The article goes on to say that "beds will feature Sealy 720 pillow-top mattresses. The new matresses slected for the sofa beds earned a top comfort rating during recent market tests".
Anyway, I'm thinking that if you sent Carli D'Agostino an email, she'd be able to get the exact model number for you. Interestingly enough, she is also featured in the Summer 2006 issue!
Best wishes -