Preheat oven to 375 degrees . Bake the bacon on a broiler pan until crisp, 15-18 minutes. Let cool, then coarsely chop.
Mash the avocado with the sour cream, lemon juice, garlic, onion and cilantro; season with sea salt. Fold in the lobster. Fill the toasted rolls with lettuce, lobster, bacon and tomatoes.