OK, I finally tracked this thing down. I saw it, or something much like it in an RC magazine recently. It's a simple and stupid thing, but I think it will be good. It is simply a plug for the hole left after you remove the m11's antenna to install Spektrum.
Here's the link: http://acratech.net/miva/merchant.mv...tegory_Code=RC
Unfortunately it looks as though it would cost ~$9.50 to ship an item that costs about $8.50. NOT GOING TO HAPPEN!!! Anyone know where I could find one of these for less?