Borrowers are becoming savvier when it comes to alternative mortgages. At least, that’s been the experience of Homebridge Mortgage. “A larger and larger percentage of borrowers who seek us out already have in mind a type of amortization schedule – and a type of mortgage product – that they feel is what they want,” said Paul Levine, chief operating officer for the New York-based mortgage bank. “There has definitely been a change in the share…