Double Bed Question

We have become proud owners of a 2003 2720 in the last two weeks. We are spending time getting it set up just right for us. We have used your forum many times and would like to thank you for all the help you have been. We took your advise and found a queen size aero mattress on ebay for the queen bed....but have a question for you trailmanor veterans.....with the size of the double bed we have not been able to find any aero mattresses that will fit it.....so what have you all done to make the double bed a little more comfortable? And...what size sheets do you use on it?