Popped into my local roof carrier shop and he suggested the following for the WK14 GC. In the Thule brand the Wingbar Edge 959x (nothing sticks out) or if you prefer the bar sticking out the Thule Wingbar. The Edge is rated to 75kg and the Wingbar to 100kg. I believe you have to add a fitting kit which is the Thule Rapid System Kit 4019. I was quoted $460Au for the Wingbar edge and $425Au for the Wingbar.
The other brand he offers is the Rhino, which comes in the following models: Vortex 2500 RS Black 2 (no stick out) - $319Au, Vortex 2500 Black 2 (bar sticks out) - $329Au and the Vortex RLCP Black (bar sticks out) -$376Au.
Interestingly the average price the dealers are quoting me for mopar racks is between $700 - $800Au. I don't think I'll be going mopar! Hope this helps.