I'd like to connect a signal processor and amp to the OEM navi in my 09 Fit Sport. I'd rather not cut into any of the wires in the dash if I can help it. I'm looking for a wiring harness that will plug into the navi and give me access to the four speaker outputs and, ideally, a "remote" wire.

This is the closest thing I've been able to find so far:
Pac-Audio.com Product Details | iPod Integration for your car and More by Pac-Audio - Connecting you to the future

I've talked to a couple of guys at PAC Audio; one said the above "would" work, the other said it "might" work. I don't need a LOC, anyway - my signal processor will do that - I'm just looking for the plug/wiring bit.

1) Has anyone tried this PAC Audio unit with an 09 navi deck?
2) Are there any other alternatives?

Thanks!