Hey Gerr, You can use drop d tuning (D A D G instead of E A D G) - dropping down to the low D (tune your e string down 1 full tone to D) or, as the bass cover guy did, just use a d an octave higher than what Duran Duran's keyboardist plays. So instead of a low D on the open D string, play a d at A5. It's an octave above what is on the recording, but it sounds fine.
Hey Sid. I was playing “the man ..” until find the perfect melodic (4 string bass). It was not working. True, John plays the bass 4 strings (his old Aria). My bass have 4 strings too