I decided to create a post for deals for the Desert X.
Here is what I found and purchasing!
Garmin Zumo XT $399.99 on Amazon. $100 discount
Here is the installation guide!
Instructions with photos - How to wire a GPS unit to a Ducati DesertX - Garmin Zumo or other GPS unit
Now, you just have to buy a GPS mount from Perunmoto or EvoTech.
This should cost $399 + $99 = $499 versus buying Ducati version which cost $900.00