What would a SMB2 Desert theme sound like? I found some background tracks from The Super Mario Bros Super Show, which is mainly based on Super Mario Bros 2 and its predecessor, so maybe the Desert music could sound like this. Most likely the slower track, but extended.
I would recommend someone to make a BeepBox or Famitracker cover of this, or a similar track. Credit to The Super Mario Bros Super HQ on YouTube for ripping the songs.