An Internet bank has come out with a niche product line of jumbo and super-jumbo loans to meet the needs of the super rich. Historically, brokers have had limited options when it comes to loans over $300,000, said Trevor Rozowsky, president of the 1-year-old VirtualBank Mortgage. “Because we lend for portfolio, we have the flexibility to apply our understanding of the business and work with our partners to service qualified