I too have found that the feature that allowed you to VIEW the lowest published fare in International markets (and the Calendar to select dates) has been deleted. I am not sure why?
You should have no problem BOOKING a fare, you simply cannot "search" for the lowest published fare any longer w/ Flexibility. I use Travelocity a lot and like their service.
You can try a consolidator, or use http://www.mobissimo.com/search_airfare.php.
NOTE: The Travelocity "Flex" Search STILL works for domestic flights.
Hopefully they will return this valuable service for International searches?