UPDATE!

Oval, chrome replacement tips ARE available in the US! They CAN be ordered through your dealer, and they WILL get them from Germany in 10 business days!

I terminated the order in Germany, and placed the order through my local dealer. The cost?
$165.- USD shipped to my address! A bit more than in Germany, but no hassle, and more business for my dealer (who is a friend, and a former business partner).
And that's the end of the saga. I'll have them installed in less than two weeks.

That's the way to go.