Peterborough and the Kawarthas seafood market???
Live Lobster should be in the larger supermarkets, Loblaws, Sobey's or Metro, if they have a seafood counter.
Scallops, shrimp and King crab legs are shipped frozen to Ontario, so Costco is the best bet, particularly when they have a seafood roadshow kiosk once a month. Their large scallops are on special this week.