Just a shot in the dark..... try "A Manger" at the corner of Malabia and Charcas in Palermo Viejo. Even if they don't have it, please let me recommend a brand of dulce de membrillo called "Zungri". Fabulous if your not diebetic. In any event, for my money the best specialty food place in town. You will drool. There is also a huge fiambreria with all kinds of imports in Belgrano, and I want to say it is called "La Tabla", or something close to that. It is a couple or three blocks or so west of Cabildo on a street that runs parallel to Cabildo. Good luck. I know the maple syrup addiction. You might want to look for a maple syrup halfway house if you can't find the stuff......