So, I contacted the post office today, to get some clarity regarding shipping.
Turns out they changed their policy. Now the maximum dimensions of packages can't exceed 100x50x50 cm (LxWxH). In other words, they won't send them.
The Express department of said post office can send them, but prices are very high (700 euros).
Now, I did a quick estimate at UPS, and shipping the skirts would come to 200 euros. Much cheaper.
However, are you guys willing to pay that for shipping of the parts?