I've used the remnants of my handlebar tape after a fresh wrap. Build the diameter of the bar with a wrap, or what's needed, and clamp the mount over that. That'll get you going, and the wrap matches the tape, so not really unsightly.
Or shop around, I've found mounts for my Garmin with shims to be used for smaller diameter bars.
And while Bicycle Computer Holder For Garmin Bike Front Light Bracket Handlebar Mount | eBay isn't an out front type mount I have used it and it's pretty stable. Don't know if they can be had to be compatible with your computer.
Or shop around, I've found mounts for my Garmin with shims to be used for smaller diameter bars.
And while Bicycle Computer Holder For Garmin Bike Front Light Bracket Handlebar Mount | eBay isn't an out front type mount I have used it and it's pretty stable. Don't know if they can be had to be compatible with your computer.