I have a Garmin GPSmap 60Cx, which isn't a bad device, although it approaches a brick in size and weight. I had a special handlebar mount for it, but the damned thing broke the other day while I was in the middle of a tour. I guess the cheap plastic it was made out of couldn't take so much exposure to the sun.

Instead of buying another one, which I'm sure would give the same results, I wonder if there's a good universal handlebar mount on the market, perhaps an adjustable one that would allow me to switch off between the GPS and a cell phone or other device.

Thanks for any help you might be able to offer.

Ram mount (https://www.ram-mount.com/) might have something for you. I have the mount for my car. Basically you buy the cradle and then the separate mounting unit. You could get, say, a cradle for your GPS and a cradle for your phone, and then swap them out of the mount as needed.