Ameriquest Capital Corp. led the wholesale origination pack at 2004’s midway mark, a new Inside B&C Lending analysis reveals. Based on data contained in its securitization filings, Inside B&C Lending estimates that Ameriquest – through its Argent Mortgage and Olympus Mortgage subsidiaries – generated $20.64 billion in new subprime mortgages during the first half of the year. That was a remarkable 318.7 percent rise from the same period…