Arduino Due Level Shifter Shield


I have a magnetic sensor that outputs -10V to +10V AC (which is proportional to the magnetic field) and I want to send this signal to my Arduino Due. However, the Due's Analog In pins only take in 0V - 3.3V.

So I am looking for a level shifting shield that can convert the -10V to +10V range to a voltage range that the Due can handle, preferably 0V to 3V.

Does anyone have a idea of where I could buy a shield that does this?

Thanks, :)