I googled but didn't find any lists. But it's not difficult to get a rough idea:
Air Mauritius: 520,672; L'express: 207,879; Lux* Island Resorts: 123,358; MCB: 104,479; Beachcomber: 72,249; Defimedia Group: 45,843; PMSD: 31,432; ION News: 31,348; SBM: 30,213; MMM: 30,172; Parti Malin: 27,975; Mauritius Labour Party: 27,825; Courts: 25, 268; Le Mauricien: 18,863; Flying Dodo Brewing Company: 13,670; J Kalachand: 5,474; MSM: 5,055; MPCB: 2,710; Le Matinal: 1,564; Kozelidir: 288 (Yahoo!); Conserverie Sarjua: 177.
Air Mauritius: 520,672; L'express: 207,879; Lux* Island Resorts: 123,358; MCB: 104,479; Beachcomber: 72,249; Defimedia Group: 45,843; PMSD: 31,432; ION News: 31,348; SBM: 30,213; MMM: 30,172; Parti Malin: 27,975; Mauritius Labour Party: 27,825; Courts: 25, 268; Le Mauricien: 18,863; Flying Dodo Brewing Company: 13,670; J Kalachand: 5,474; MSM: 5,055; MPCB: 2,710; Le Matinal: 1,564; Kozelidir: 288 (Yahoo!); Conserverie Sarjua: 177.
So the PMSD and Party Malin have more likes than the Labour Party. I guess these two parties will win by a landslide in the next general elections. MK looks like it will be the first company to hit a million likes. When you deal with more than 1 million passengers every year surely it's no big surprise that you are right on the top here. But likes don't necessarily mean a lot as people like pages for all kinds of reasons. And page administrators don't all do as good a job.