Try here
TIRAN SHIPPING GEMİ ACENTESİ
Adres 44 Jaffa Road, P.O.B. 33196
Haifa 31331, Israel
Tel +(972) 4 8509000
Fax +(972) 4 8556888
Web Tiran
mailto:
tiran_hfa@tiran.co.il
I used them back in May 2013 (Sisa was the cheapest)I was on motorbike returning from Africa trip,very nice,professional,English speaking people,the only bad part is full intensive Inspection,search of your truck and your personal stuff when you arrive in Israel.
You will love Israel(I did).then you cross in Taba to Egypt.
Ferry from Egypt to wadi Halfa, That was a quite extraordinary experience.
If you travel with your adorable children,please pay and get cabin.
When you depart Egypt(Aswan) you can buy both tickets to wadi halfa for your family and your truck.
Over all very happy,nothing was missing from my motorbike,4 day later when cargo ferry arrived.
In Africa,Strongly recommend camping in catholic mission,safe and free.
Costal route(beaches)from Tanzania,Mozambique,amazing beauty.
I would secure visa for Ethiopia,north Sudan in your country.
It's inspiring,amazing,travel with young kids,you are the best parents in THE world!!!!!
Good luck

Roman