Several years ago, I bought a bag of Late Roman cavalry from a friend at the club. Finally, the armored versions made it on to the painting table. Troopers and horses appear to be Gripping Beast metals (thanks for feedback in the comments), but I cant find a source for the chap in cloak that I'm using as the signifer. Spears are from various Gripping Beast plastics, as too is the labarum.
The complete unit.