Ok; I go a new Bontrager node 1 computer, it works great and the sensor is built into the bike. I would like to utilize the heart rate monitor feature ( I use a Timex one now) on the node 1. Where do I find a ANT+ heart strap. Evidently Bontrager does not sell those unless you buy the package. I hear the the Garmin strap is compatible.........are there any other recommendations on where to get a ANT+ heart strap?? or some brand name to look into??