IMO, it doesn't have to be a Ric as long as you use flats, a pick and palm-mute the strings (or use the Ric's bridge mute). This is another example of things that Sir Paul did which are pretty easy to play if you're concerned about the notes alone, but giving them that character isn't an easy task.
Here is an example I've posted here lots of times which I think perfectly demonstrates what I'm trying to say: The notes are easy to figure out and play, but can you make them sound like that?
