I’m using Eztag Bluetooth GPS (B3) which was released last month to work with my D7000 and also D300s. very cheap. Just ＄150 by paypal. Set up and use are really easy. Most of all, both my gears could work together with it.
B3 is the series that one main device work with 3 receivers. Means if you have 3 cameras, and you want them work together, you can choose this series. There are other series; you may browse its web.Shenzhen Easytag Hi Tech Co.,Ltd I believe some products that made in China is good, like this company, which has agents in Canada.