I had a Samsumg SIII bike holder lying around, which almost fits the ZR. With a bit of heating I was able to bend the levers a bit for a snug fit. Works like a charm!
Got the product from EBAY, link doesn't work anymore. Product description is (Black Bicycle Cycling Bike Holder Cradle Mount for Samsung Galaxy S3 SIII i9300 (170908085268). Price €4,49