I'm a fan of Corona Premier myself, and more often than not the spot on the shelf where it should be here at home is empty as it's quite popular. I also looked for it in several spots in SXM the last couple of trips with no luck. Premier is a light and tasty low carb beer, and I think the closest thing you'll find to it on the island IMHO is Amstel Bright. Sun, sand and a lime slice really go along well with it.
Cheers!