Cutter Suction Dredger work machine needed in Egypt

We would like to inform you that we need a cutter suction dredger for collection clay and sand from river to make clay bricks.
I am sending you the main parameter to select the second hand best one.
Dredging depth : 10.0m Discharge dia : 400-450mm Total power : 840-890KW
All the pipes will be arranged locally.
We have reduced the dredging depth from 13 to 10m.
Our Budget is EURO 600000 Maximum 10-15 years age is acceptable.