Get them here -

• SWAT 3: Elite Edition 1.7 Update North America
  
• SWAT 3: Elite Edition 1.7 Update United Kingdom
  
• SWAT 3: Elite Edition 1.7 Update Deutsch
  
• SWAT 3: Elite Edition 1.7 Update Espaol
  
• SWAT 3: Elite Edition 1.7 Update Italiano
  

The patch comes in at 3.6 meg but people are reporting problems joining Won servers at the moment, the general advice seems to be keep playing 1.6.6 until an update is requested by the Won.net servers.

** EDIT **
SWAT 3 European Data Update
There are six unique localized versions of SWAT 3: Elite Edition; North America (English), United Kingdom (English), German, French, Italian, and Spanish. This optional update allows owners of the French, Italian, and Spanish versions of SWAT 3: Elite Edition to join multiplayer games created by North American and United Kingdom players and vice-versa. Owners of the North American and United Kingdom versions of SWAT 3 should not download this update. Due to local regulations, this update is not compatible with German versions of the game. This update requires the prior installation of the SWAT 3: Elite Edition 1.7 Update.
Get it here.