The best replacement for mercosur is nafta.

The best alternatives to mercosur are rated as following:
★★★★★  nafta
★★★★★  pacific alliance
★★★★  alianza del pacifico
★★  mercosul
★★  union europea
★  alca
★  unasur

Your alternative for mercosur is not listed? Suggest!
Speaking about mercosur, one probably shouldn't forget about venezuela.

Other search terms related to mercosur and their ratings are:
★★★★★ venezuela
You have in mind a companion for mercosur and it is not yet here? Propose!



Google Trends

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mercosur
nafta
pacific alliance