Aftermarket head units for a Prius 3.5 (Persona)?

I have seen that the Pumpkin head units are working for people with Prius 2's. Is there any chance of getting one of these to fit correctly if you have an existing OEM touch screen headunit?

I greatly dislike the OEM headunit and I want to get something better.

These are the headunits I'm referring to -



Pumpkin double/2 Din In Dash Android 4.4 Kitkat 8 inch Head Unit gps navigation system Toyota Prius 2009-2013

8 Inch Quad Core Android 4.4 DAB Car Stereo for Toyota Prius (2009-2013) Left-driving Cars 2 Din support DAB+ DVD MirrorLink OBD2 WiFi 3G Steering Wheel Control - Pumpkin