helmet bag/luggage

[truckguy02]

help please i would like to inquire if any of you ever carry extra helmets and if so how? i have a 2005 nomad 1600D1 and sometimes we leave for a ride with our full face helmets and find it too hot latter and would like to be able to switch to out 1/2 helmets but have no way to carry our full face as they won"t fit it the saddlebags. any recommendations on a bag that will carry two full face helmets and can be use with the stock kawasaki rack on the backrest will be very helpfull. thank you all.