I have had it my head to do one of these for a while. The figures are RHA from "Front Rank". I had two with rammer which had it cut away and had my own home made rockets added. They are made from piano wire, , some milliput rolled into a small sausage and fixed to the end. A couple of thin bits of paper cut and stuck to wrap them on and finally a small ball bearing added for the ball.
The rocket firing apparatus is made from brass wire and sheet, soldered together. It may not be 100% accurate to the originals (thats is another project with the heavier version launched from the wagon) , but put it on a table and people will see its a rocket troop. As far as i have read they fired a lot straight from the ground as well , so who knows that may be another one to do.
Background to the photos courtesy of Mark Freeth at the Wargames Holiday Centre (Yes that is La Haye Saint in the background)