rear box with room for helmets

Looking at rear boxes. Usually ride solo but usually carry an extra helmet if a friend wants to take the quad out. Would want a box room for ideally 2 helmets.

Looking at:

Plano Rear Mount ATV Box
Around $100, seems to have some quality issues and not sure how I feel about bungees as latches to close it.

Raider ATV-500 Rear ATV Rack Box
Around $100, lots of people complain about the latches and the built in lock.

Any others that I am overlooking? The box does not need to lock, just want it secure and enough room for helmets and some other small things.