We use standard queen-bed sheets for our 2006 2720SL, fitted for the bottom, flat for the top, and they fit quite well. We used the same for our 2002 2720SL. So I would expect them to work for your 2003. We don't have an aero-mattress, so I can't help there. We simply bought a queen-size piece of 1" or 1-1/2" egg crate foam, and it has been great.
Bill
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