anyone know where I can get a "micro mini" extender cable to power the stock mic on the XLH1 and then run the mic in to the rear XLR inputs?

no luck with markertek....

That's going to be a make-it-yourself project, but I'm curious as to why you'd want to do that.

In the first post in the "tips & tricks" sticky above Gabriel Fleming recommends this as a way of being able to use the stock mic and a lav at the same tims.

I find the rubber isolation on the mic holder on the XLH1 is a litlle soft for a longer/heavier shotgun.

You're referring to this:

"Using the Canon on-camera mic via an XLR input: Say you're using a single boom mic, inputting via XLR 1. You've got XLR 2 doing nothing, and the on-camera mic doing nothing. Seems a waste. Well, all you need to do is adapt the on-camera mic to input through XLR 2. A short female-mini-to-male-XLR adapter will do for the audio signal, but the mic needs power. Simple, just get a short micro-mini extender cable, plug one end on to the mic, and the other into where the mic's connector would normally plug, on the camera's handle. Make sure the mic is switched to stereo, and voila, you have a second XLR mic."

From http://www.dvinfo.net/conf/showpost.php?p=469050&postcount=1

It's certainly viable, assuming that you want to fabricate your own cable. However it's basically taking a mono feed from a stereo mic. A short shotgun might be a better way to go.

not so simple I guess - the space between the two power pin and the audio pin on the mic plug is too small to allow 2 standard female adapters to fit