I bought this, took 1.5 weeks to get delivered but works as well as garmin: http://www.aliexpress.com/item/High-Quality-1set-Wireless-Sport-Sensor-Chest-Strap-2-4G-ANT-Heart-Rate-Monitor-Smart-Belt/32471759364.html
perfect, thanks.
@gillies started
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I bought this, took 1.5 weeks to get delivered but works as well as garmin: http://www.aliexpress.com/item/High-Quality-1set-Wireless-Sport-Sensor-Chest-Strap-2-4G-ANT-Heart-Rate-Monitor-Smart-Belt/32471759364.html