Well I hoped that you'll understand what I mean that they have their own esc (it's clear that they don't design and produce them).
About HobbyWing they don't have only 80A spec esc but also 150A esc which run up to 6s.
80A esc marked as Stock
http://www.hobbywing.com/english/Art...?ArticleID=431
150A esc marked as Modified
http://www.hobbywing.com/english/Art...?ArticleID=429