OMG, what a difference a new mattress makes! Just purchased new queen mattress for 2013 bunk model from mattressinsider.com. Have never slept better. They are so easy to deal with and are really reasonable on price. We bought the 8" luxury cool max (only $20.00 extra for custom orders), custom sheets and custom mattress encasement for around $700.00. We received all in less than 2 weeks!! They have a link on their website to request your bedding schematics from airstream (took them longer to get the drawings to me than to order and receive the mattress
. Although, if you have a 13' or 14' bunk then mattress insider already has the drawings because I sent them in for the front queen and the upper bunk (I do have lower bunk that were sent later).