Using the Garmin Foretrex 401 for a while on the bike I wanted to see the speed and directions screens a bit better so decided to get a bike handlebar mount kit. The clip is an accessory for the Forerunner but works fine with the Foretrex.
The Garmin part number is 010-11029-00 and I bought mine from Amazon for £9.35. The clip is made from rubber and fits over the handlebar quite snugly. The Foretrex velcro strap will hold it but it does twist round particularly when riding over rough ground, so I suggest using the two black tye-wraps (supplied) to anchor the unit to your bike before putting the Garmin on. Fitting them is a bit fiddly though.
I was reluctant to perminantly attatch the clip to the bike in case it came off or was stolen but it’s not been a problem. I would not suggest leaving the Foretrex on the clip when folding the bike though!

