Pop in, we have SW Motech dry bags in 5 sizes, some bigger than the ATG inners, and we also have the non-waterproof pannier inner bags (3-part set), that will fit most all boxes (OEM, Motorradical, Globe Scout, TRAX, etc).
If the panniers and top box ARE waterproof, would you still need waterproof pannier inners?
Cheers
Chris & Team