Pioneer, JVC, Dual, Kenwood, Jensen - Need wiring diagrams and wire harness too

Pioneer, JVC, Dual, Kenwood, Jensen - Need wiring diagrams and wire harness too

Anyone know a good website or other online resource for wiring
diagrams or install manual for current and older model car receivers?
Everything via google no good for the most part, esp for the older
models.

I have alot (over 30) of Pioneer, JVC, Dual, Kenwood and Jensen car
receivers, I need a good place (cheap) to order wire harness for them
too.

Any ideas will be appreciated.

Thanx in advance.