I hope this might help someone else out, but before I picked up my new UK-spec (right-hand drive) car I ordered a pair of genuine rear rubber mats from a company that ships from Germany (
Genuine Autoparts). The part numbers for the rear mats listed on the ETK.CC site show them as being for left-hand drive cars, but it turns out that they are not specific to one or the other. They fitted perfectly in my right-hand drive X1
There are three different parts listed for rear mats, the difference being the colour of the X1 badge at the edge:
Black badge - Basic - 51472365856
Black and red badge - Sport - 51472365857
Black and silver badge - xLine - 51472365858
They are genuine BMW rear all-weather mats, and cost me £41.04 delivered. I didn't want to fork out the £92 for the full set as I really only wanted the additional floor protection in the rear, hence the need to order from outside the UK as they weren't even listed in my local BMW parts place.
Anyway, I hope this information might be of use to someone
Here's the part numbers from the ETK.CC site. I imagine it's a different story with the front mats, as I'm sure they will be "steering side specific"...