xm antenna

I would be interested in buying a GXM 30 Antenna for Garmin Zumo 550. If anyone wants to sell one, please PM or email me [email protected] Thanks

Is there a way to connect a Garmin Zumo 665 to the on-board XM antenna on a 2010 with Navi? I'd rather do that than purchase another Garmin antenna since the Honda has one in it already. I also don't want to use the Honda Navi for the weather since it's an additional subscription, and the Zumo...