A Canadian-based mortgage company has pushed the envelope when it comes to amortization, launching a new 50-year program. But don’t expect the product to stay north of the border: Reliant Home Warranty Corp. is gearing up for a push into the U.S. “This innovative action by Reliant will give mortgage customers the ability to make the most use of their hard-earned income and make housing more affordable to the consumer,” said Boyd Sousanna, Reliant…