Luca,

I'm traveling to Puerto Rico, perhaps I'll be able to get some 100 foot (30 Meter) original! 550 paracord from Contycomm and take it with me back to the Netherlands, I don't know about postage to Puerto Rico but USPS considers it an US inland"shipment so it can't be much more then regular US mail.
Countycomm sells te paracord in different colors like Black, OD, Desert Brown, White and even Orange.

Best Scouting wishes from Holland,

Bagheera