I am going a different route and i have this unit for sale. Asking $400 shipped.
The mObridge Digital Pre-Amplifier is a revolutionary method of integrating high-end aftermarket audio components with the factory radio. The DA1000 replaces the factory amplifier and eliminates the need for high to low voltage converters and or summing devices. Simply disconnecting the optical cables from the factory amplifier, and inserting them directly into the DA1000, will provide 2-channels (stereo) of full range, ultra clean, digital audio output. This digital output can be transferred to an aftermarket Digital Sound Processor, or directly into an amplifier, via a standard Toslink cable.The mObridge DA1000 interprets many of the factory radio commands eliminating the need for an external volume control knob. Its DSP processor will decipher and control volume, treble, midbass, bass, subwoofer, and balance functions of the factory equalizer.