Does anyone know of any options for attaching Thule crossbars to the round rails on the 200 wagon? It seems that it would be a pretty basic adapter to allow the crossbars to be clamped to the rails, but I haven't found a source for them. Thule--in the US, at least--lists an adapter for the airfoil shaped rails on some station wagons (ford), but nothing for a basic round rail. Any BTDTs? Thanks, Brian