Mounted Longbowmen for Lion Rampant

I'm thinking about adding another unit to the plastic traffic jam of Lion Rampant figures that is currently sitting on my painting table. This would either be a second unit of twelve longbowmen or a unit of six mounted archers, rated as heavy cavalry in the rule book. I have a Perry Miniatures boxed set of mounted knights which includes two figures in gambeson per sprue, which will give me enough for a unit of six, especially if I use spare arms from the English and French infantry sets for added variety. I'll have a look at gluing something together at the weekend, while cracking on with painting the pedestrian equivalents.