Where to find connectors/harnesses for JBL amp?

Has anyone found a source for connectors that could be used to tap into the inputs/outputs on the JBL amp. There are two connectors on the amp, one for speakers and power, the other for analog inputs and digital signals. More info at

http://www.tom-morrow-land.com/tests/priusaudio/

Has anyone found connectors or harnesses that could be used to tap into either the amp inputs or outputs without disturbing the factory wiring? I haven't found anything, so I'm interested in whatever is available, whether it's male, female, and either connector.

The only harness I've found claiming compatibility is the bazooka FAST-8113:

http://www.sasbazooka.com/productAutoAcces...FAST.asp?id=298

But it's not clear where that connects. I don't know where the wire to the jbl amp connects to the radio. Perhaps the radio has a connector like pictured at:

http://www.installdr.com/Harnesses/Toyota-Wiring.pdf

Which would might work with a harness like this one from bazooka:

http://www.crutchfield.com/S-XKr8HRM89t2/c...1761&display=XL


Please post any information you have about the JBL system. Oh, and if anyone knows the voltage and/or impedance of the analog right and left signals that feed into the JBL amp please let us know.