Many years ago I had a large collection of white metal zulu war figures - a bit bigger than 1/72 from my recollection - which I set up on my own Rourkes Drift diorama. I then proceeded to recreate the battle playing the part of the hill snipers with my air rifle.
The Zulu War by David Clammer is a good source of reference. Low on pictures but has a very good section on the impis, shield colours, names and hierarchy.