Rather than trying to find something relevant in Hanon, why not make up your own exercise from the pieces you are playing.
Take a bar that gives you difficulty, and practice it. Go up by tones, then by semi tones, repeating the same figure. Change the timing, so its in thirds, fourths, sixths. Loud, soft, stacatto, legato.
It will be of direct benefit to your pieces, and you can apply it straightaway.