Yes, I believe the plug by itself is available but M&H (Yearone) makes harness along with some others I think. You can also throw up an ad on here if you just need something specific.
I get my replacement harnesses from Classic Industries. They have OE front lighting harnesses and engine harnesses, as well as just the plugs, if that's all that you need. Great quality!
I apologize to the above responders. I missed your posts. It's entirely possible I was imbibing a wee bit when I authored this post. Thanks for the info!