Lisle makes good tools at a reasonable price. Here's a metric set, and they also have it in SAE. Click on the "Find it now" link and it will take you to the exporter information.
http://www.lislecorp.com/tool_detail.cfm?detail=530
For the absolute best quality, and highest priced tools, you can buy direct from Snap-on in Japan.
http://www.snapon.co.jp/