While Garmin is capable of making some fancy smancy GPS units, the same folks make some floppy mounts. Floppy in the sense it's possible to pop that $900 bucks right out and skip it down the highway. Here's a nifty trick.
Here are the parts sourced from Lowes:
The Hillman Group Spiral Wrist Band - Plastic Key Rings Item #: 33287 | Model #: 701304
Gardner Bender 10-Piece 1" X 1" Black Mounting Pads Item #: 292685 | Model #: 45-1MBUVL
From auto parts store:
3M™ VHB™ Tape 4910 Clear (It comes with foam tape, but I have really good luck with this stuff)
I hang the wrist band off the mirror mount. Works with both mounts I have including touratech locking mount and the stocker Garmin mount.
Here are the parts sourced from Lowes:
The Hillman Group Spiral Wrist Band - Plastic Key Rings Item #: 33287 | Model #: 701304
Gardner Bender 10-Piece 1" X 1" Black Mounting Pads Item #: 292685 | Model #: 45-1MBUVL
From auto parts store:
3M™ VHB™ Tape 4910 Clear (It comes with foam tape, but I have really good luck with this stuff)
I hang the wrist band off the mirror mount. Works with both mounts I have including touratech locking mount and the stocker Garmin mount.
Here's another option I've seen, but never personally used. This is a GoPro Hero mount from Ebay.