Airlifting Nairobi - Casablanca is a good idea
Sorry to hear about another case of malaria, let's hope for a a quick recovery without complications. I have friends in Nairobi where you could possibly park the bikes safely should you need medevac rapidly, if you don't also fly the bikes out at the same time.
Back to "Out of Africa" options, Nairobi - Casa is a good option, although I actually had lousy service with Royal Air Maroc (RAM) getting a quote for cargo service last year when I wanted to ship my KTM from Cairo.
Alternatively, flying the bikes to UK on Kenya Airways Cargo (KAC) then ride to the Netherlands could also be an option in view of possible medical complications. I imported stuff from Kenya last year and airlifted everything on KAC at a very decent price. I could pass on the contacts of the custom broker should you need that.
If the option of making it to Egypt remains on the list of possibilities, with all its complications and costs, be aware that elections previously planned to be held in September in Egypt are said to be postponed to October or November, which would possibly also delay ferry services between Alexandria and Venice.
In any case do bear in mind Ramadan (August this year) and the heat factor driving North to the continental Coast. Far from ideal for sound and safe recovery
Parking space available still. Be well, stay safe in Nairobi. /C