Any recommendations for a weatherproof roof rack bag for the large Maximus 3 rack? The rack measures 76” x 54”, and I would like a bag that fits at least pretty close to that width and preferably close to the length too. The problem is, most roof rack bags I find out there are much smaller, usually around 44”L x 35”w x17h. I think that would look really awkward on such a big rack and would not hold as much stuff as I need. I have seen plenty of what appear to be weatherproof bags on wranglers that seem to fit pretty well and close to what I am talking about, but for all I know they could all just be bags that came with rooftop tents that they are holding inside.