Moe at the Walnut Street Market (on Lincoln St.) in Newton Highlands imports Montreal Bagels about once a week. They are absolutely terrific and the genuine article. Good fresh or frozen.
He also plans to start importing smoked meat from Montreal in the next few weeks --- will keep you posted if this actually happens.
In addition to Persian rugs, the other special treat at this small market is the homemade Jewish deli-style whitefish salad, which my mother says is best available in the Boston area and rivals even Rein Deli's in Connecticut.