Some of the cavalry would do for much earlier except, perhaps, for the quivers. I'm thinking of Outpost if they would just send me the lamellar armoured ones. They paint up really nicely and have a great sense of action.
I'm not sure about how early the brigandine armour is suitable for - there is a suit in, IIRC, Japan which is supposed to be invasion period Mongol. The newer Osprey elite shows some troops wearing it too.
I wonder if we bombard Outpost if they would do some armoured cavalry
I've thought of trying their Turkish or Sui horses, though it would be nicer to have proper ones.