You can find it on this page:
http://www.dell.com/us/business/p/xps-13-9360-laptop/pd
The most straightforward way is to select "Ubuntu" as the "Operating System" filter at the top of the models list.
Outside the US you should follow the links in this article:
https://bartongeorge.io/2016/10/04/the-new-xps-13-developer-...
UK Site - I can't see any way to configure with anything except Windows 10 Home.
In the Configurations section (where you see the first 4 models), you have to push Next until you are at the end of the list. The last 3 models mention Ubuntu (last 4 in the US).
Re:Macbook Pro Touch Bar runs watchOS
by sauerbraten on Friday October 28, 2016 @09:55AM
(#12815794)
Here you go: http://www.dell.com/us/business/p/xps-13-9360-laptop/pd?3x_n...
You have to use the normal XPS 13 page and choose Ubuntu from the OS filter.
Thanks, not sure what up with that other page. As I feared, Dell still only offer the standard def screen on the lowest end model. I do not want a touch screen and I do not want the high dpi screen, if only for the extra power required. Why Dell thinks the high-end screen is desirable on a developer laptop is beyond me.
http://www.dell.com/us/business/p/xps-13-linux/pd