I don't think the Abyssinian warriors looked liked that in the medieval period though. When I was looking for info on a Portuguese in East Africa project, I had in my mind, Im sure I read that trousers didn't really come into use until the 18th century. For earlier Abyssinian you might be better taking a look at Copplestone Somali's or kit bashing Perry Beja.
I agree about that. Ethiopians from a colonial range will be dressed in fashions that are much too recent, not to mention that you'd have to weed out all the figures with guns.