She is beautiful Muhammed!
I see what you mean, looks like you will have to stick to a HDS5. You might be able to squeeze a 7 in the top.
Here is a template, see if it will fit.
Select "In-Dash Template from the list ...
http://www.lowrance.com/Products/Marine/HDS-High-Definition-System/HDS-7-FishfinderGPS-Chartplotter/Downloads/