This page has up-to-date gold and silver prices using the Gold Price plug-in for WordPress. These prices are easily readable and importable as text (so useful as a data import for Excel).
Note that the U.S. prices are probably accurate but spot prices in all other currencies will be converted using averaged exchange rates (mid point between the banks’ buy and sell rates) so will likely be lower than the spot rates you’ll see from a precious metals dealer in your country.
New Zealand Dollars
United States Dollars