I always liked that tune but never bothered to learn it (I’m lazy that way). However, your very nice rendition of it made me write it out with a few bluesy additions.
I tend to play these AABB tunes straight the first time through each section with some changes the second time. This is what I came up with.
By the way, I wrote it out in G major (meant to be capoed on the 2nd fret so that it sounds in A major)