FWIW, I spent a lot of time trying to find "twisted pair" RCA cables as mentioned in this post. (with open end to splice into the HU output wires....) after a lot of stuffing around, I finally realized I can just order regular twisted pair RCA's and cut them. 1 pair will provide 4channel RCA's when cut...

If others are looking...
I was installing an amp at the same time, so I got an Amp wiring kit from here:
http://www.autotoys.com/x/cust/searc...isted+pair+rca

Thought it might help others when looking for wiring and parts.