I'm not sure, but I'm guessing that the grills can be removed without too much damage, if you're not in too much of a hurry. (They would probably have to be epoxied back on to Don's car.)
If that's an option, I would just choose the most beat up (or most common) set of gray pillar trim (provided the grills are okay) and then remove said grills.
Maybe the fabric could be purchased and included in the same package, for shipping to Europe. Would save Donster the cost of shipping a separate package. (Neither the grills or the cloth should be very large - or heavy - with both packed into a shipping envelope or box.)