Looks like a definite possibility, but boy does it have mixed reviews. Do you know anything about Elias's on Ouellette?
Elias Deli Eatery | WindsorEats
It looks like the only competitor. Meanwhile, I did find one place on my side of the border:
Beef Sandwiches | Zingerman's Deli
They even hand bake Montreal style bagels. Zingerman's is pricey but when you factor in the $10 bridge/tunnel crossing fee, it may be close. At the same time, it just may not be the same.
It sounds like I shoot my blood pressure to H and report back who the winner is.