Thank you all for your comments and help with this, much appreciated.

WormGod, many thanks, indeed if I was nearer I would buy your kit off you, but shipping costs may be prohibitive / not trivial?
Do you think you could please take a look at the reference of your Thule rail-wind deflector (that you use for the Yakima basket) if you could find that I would be very keen to see if I can try to cross-reference it with the Thule fittings available from the UK as I am sure there will be something they have that will fit the VX in a safe manner....

Cheers,
Fabrice