Grimsby Wargames Society, the Saints of Caffeine-Hands, has some more free flag sheets available over on their website.
From the post:
Free Sudanese flag sheet of all the battalions from 1893-89 on the main website
Each infantry battalion was issued a plain green silk flag, about 40″x32″, with white Arabic (Hindu) numerals of the battalion on the center with a white crown above. These flags were carried into battle during the Sudan 1883-89