WANTED: Roof Top Box

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Hi - so, Im off camping with the family on friday (hopefully the weather will be better than it is right now!). We've bought a new family tent and have just realised it pretty much takes up the entire boot space. So my options seem to be

1. Dress the kids in every item of clothing they will wear over the weekend - not sure the seat belts would still fit though!

2. Make a rash impulse buy and get a roof top box. Problem is I'm fast running out of days to buy one

So, I'm hoping there is somebody out there reading this that either has a roof top box for sale, or one that they would let me hire (friday - monday)

Please help!

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Forgot to mention - I have Thule Aero roof bars already fitted to the car. Not sure if this makes a difference or not

Thanks