IanD

Contrary to popular belief, the Thule 418 foot pack is still stocked by Thule Canada (Montreal) I used one of my customers to order it for me. Just about any bike/sports shop that carries Thule can order the pack for you.
It fits perfectly into the hard mount points in the top rails. I slightly modified the rubber foot pads by carefully cutting off the two little rubber "nubs" found on the bottom of the pads. Perfect fit. Thule will be offering a "Fit Kit" for the X-Trail in 2006 when the truck becomes available in the USA. The only problem with the 418 system is that it does not completely fill the space in the top rails. The new kit will.
As well, I noticed that there was a lot of wind noise with the Thule installed. That was fixed with the installation of the Nissan Sun Roof Deflector. Very quite now.
If you are in a rush to mount your Thule, get a 418 kit. If you can wait till spring, the "approved" kit will be available then.