You could do a search on the Free Software Add Ons for:
Zone Table
and you should get:
http://www.zen-cart.com/index.php?ma...ord=zone+table
There are 2 that might work for you:
Zones Flat Rate (for Multiple Zones)
Zones Table Rate (for Multiple Zones)
This let's you make Zone Definitions and setup the DETAILS for the specific Zones of a Country ...
Once made, you can then install the shipping module and set the amount you want to charge, either by Table Rates or by Flat Rate for the specific Zone Definitions that you have made ...
NOTE: if you add Zone Definitions *after* installing the module, save the settings to NotePad and do a REMOVE ... INSTALL ... and re-configure ...