I haven't looked but you might see what Crutchfield has to say about it.
www.crutchfield.com
I'll be honest here. I've bought a few things from Crutchfield, I've more often used them as a resource to find a product that I like and then search the web for the best price. If your interested in using a factory wiring harness and just hooking up the head unit, speakers or aftermarket amp their adaptors work quite well. If you buy a product from them they have fairly good model specific install instructions that make it easy for someone who may not be all that confident on the install. I'm fairly sure they are selling Alpine equipment now.