Wheel size is 18x8. 5x108 ET42. I used them on my 2.7 XF which ran on 19" wheels but I dropped to 18" for the winter and they did the job perfectly in the snow in the Peak District !
im a fair distance have used a courier in past who collect wheels at decent cost they just need them in a black bin liner with address on each, is that an ok option for you if I decide to have them can do bank or paypal ? just need to check the sizes etc thanks