The MUC store has been out of stock for months of the trolley and just has a few other assorted pieces from Travelite. They did confirm that they will restock, but only in the (ugly to me) greenish colour, not the previous colour range.
I have posted several links where this can be purchased from places which will ship to other countries in the EU - amazon.de seems to offer the best prices and has the broader colour range. You may want to consider having it shipped to a hotel if that is an option for you during your travels.
I also posted about a new Samsonite range in Germany which to me is just as stylish and it is just as light, albeit a little pricier. One of the luggage stores in MUC has it in stock so I suspect that you may be able to find it in FRA as well.
Samsonite B-Lite V79 which claims to start at 2,2kg for the 55cm/20 inch cabin trolley non-spinner and 2,4kg for the cabin trolley spinner. (also larger pieces available) Prices at MUC start at 129 Euros and up.
The case is very pleasing from a visual and a user standpoint. It has two positions for the handle. I actually prefer it now to the Travelite and the Sub-0.
Good luck!