MONTEVIDEO (Reuters) - All four founding members of South America's Mercosur trade bloc support the current terms of a long-awaited free trade agreement with the European Union, two sources told Reuters on Wednesday ahead of the group's Dec. 5-6 summit in the Uruguayan capital.

Mercosur members Argentina, Brazil, Paraguay and Uruguay are now waiting for the EU to agree to the terms outlined after last-minute negotiations to get it over the line, sources said.

Negotiators from all sides came together in Brazil last week, according to senior diplomatic and government sources, with plans that European delegations could travel to Uruguay's capital Montevideo if a deal is clinched during virtual talks continuing this week.

(Reporting by Lucinda Elliott and Lisandra Paraguassu in Montevideo.)