I have the Thule Black Wing Bars on my T6 LWB Kombi. I also used the 753 foot pack and the 3149 fixing Kit.
I started with a pair, but today added a third bar so that I can give some support to less rigid long roof loads.
As a result (of them coming in pairs) I have a spare Black Wing Bar, Pair of Low 753 feet and a pair of 3149 fixing kit blocks. All brand new and in their boxes. If anyone's interested, let me know. (I'm near Southend in Essex)