Base Model 6 speaker system upgrade

[Bigemike]

I am going to do a full system upgrade for my base model.
I am going to do a lc5i pro or similar from audio control
and a dsp amp from audio control or jl audio, most likely a vx1000/5i
active front stage, no rear fill and single 12" sub

Does anyone know if there is a harness available to get signal from the factory radio?
I can't find anything on how to grab the factory signal.

Thanks in advance
Mike

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