Spanish Gendarmes and other plate mailed cavalry

hey all, I just wanted to bring the fact that the Spanish Gendarmes' unit card shows the horse with plate mail on it, but in battle, it doesn't have the armor, I think they should have a plate mailed cavalry unit because Spain was one of the most powerful factions in Europe at the time, and also they were quite wealthy, so there's no reason why they shouldn't. so, I was wondering if anyone would be kind enough to mod the plate armored horse into the Spanish's Gendarme unit, and maybe other factions like England, Venice, Sicily and maybe even the Moors.