Processional baners are a nice extra. For the Corpus Christi procession in the Port of Rome, Civitavecchia, they had this banner on doors and windows along the processional route.
One can see how easy these are to make. Just show up at the printing shop with a nice pen and ink print. They can enlarge and print it on different materials for indoor or outdoor use. Sometimes it takes the laity to do this sort of thing (so do it!).