Not sure if you rent aircraft often... I am just guessing but I can imagine a little reluctance on the part of any FTO to let an aircraft go off on a trip to another country with someone unknown to them prior to that point.
Many of these FTO's are very busy and in little need of ad hoc day trip rentals.
A little relationship building may be appropriate, have you undertaken this trip to Morroco before ? If so then you should advise them of this fact. If not I would respectfully suggest that you seek their guidance and one of their instructors to assist you. This will raise their confidence in your ability & judgement and in turn grease the wheels for future trips to rent their machines.
Good luck !