Not specifically, but easy enough to do. There is a 5+ save for troops wearing cuirass. Just give troops an armour save for the protection worn. Something along the lines of 3+ for fully armoured, 4+ for armoured and 5+ for protected, or whatver you feel works. If you want to represent pistol proof armour just give them a 2+ save against pistols.
One of Donnybrook's strengths is that it is very tweakable to suit personal preferences.