Hi Mike,
You mentioned, "And, they ship to APO address."
It's been a few decades, but APO used to mean "Army Post Office" and that was generally how the US Postal Service would serve US Army personnel stationed overseas, the main features being keeping the cost to mail something from the USA to the APO in the far-off foreign county the same as it would be to mail it within the States.
Being able to receive items thru an APO leads me to ask, if you or your spouse is in the UK as the result of being stationed there for military service, diplomatic service, or something similar. If so, the next question is, did that posting to the UK entail the US gov't paying for the transportation of your household goods and vehicle(s) from the States to the UK? And if that's the case, again based on decades-old experience, have you looked into whether owning and operating that transported vehicle (in this case, the Stelvio) is covered by the Status Of Forces Agreement (SOFA) which applies to military personnel, or perhaps another agreement if your service is thru another federal Agency or Department? My experience was that, back in the day, the SOFA allowed Army personnel to bring personally owned vehicles (POVs) from the USA to Europe (for me it was W. Germany) and not have to change anything about the vehicle to meet any local requirements. At that time the Army issued black on white USA plates to install. When I was in W. Germany, I had brought my Mazda 626 and my HD Sportster 883, and didn't have to do anything other than get the USA plates for them.
Again, all of the above is decades old and may have been scrapped years ago, or may not apply to your specific set of circumstances. But maybe it does!