Link to a roof rack. Might fit a mini?
Roof rack

It will fit a Mini because I have the exact same roof rack, however, that is crucially missing the gutter clamps. So it would need custom made mounts, without the gutter clamps it's useless as a roof rack.

this looks like it's the same as the works ones, rubber suckers/feet on the legs and two side clamps (that are missing) fix it to the gutters. would make a nice addition to a 'weathered' look mini as it is