Try 'Let it go' a cartoon by Leunig. It can be used as a related material for Imaginative Journeys and it's pretty easy to write about. Since it's a cartoon it would hopefully be a different text to the ones you have already chosen.
Good luck.
You're probably better off not doing another poem. The techniques are all the same and it gets boring to write about.
I did that assessment today and used a cartoon and a movie to relate to my two Skrzynecki poems.
Just a suggestion :) good luck though