Mr Purples maps are not bad, they are free to download.
Topo Maps For Garmin GPS
scroll down towards the bottom.
You use to be able to downolad a kmz file off topomap.co.nz and then install on to the 62s. Go to the more function at top of page. You can then download the mapsheet as a kmz file. Copy it to the GPS and then install. But you can only install/open one sheet at a time because of the number of images in the map sheet.
You can combine two or more sheets, but it is a bit of stuffing around.
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