CEDAR RAPIDS, IOWA — Disgraced financier Russell Wasendorf will be at least 107 years old by the time he’s eligible for release from prison under the 50-year sentence handed down Thursday in Cedar Rapids. The former head of the defunct Peregrine Financial Group futures and commodities brokerage stole $215 million from more than 13,000 customers over a 20-year period. The 64-year-old Marion native pilfered customer funds to live a lavish lifestyle and expand the business, which prosecutors said was never profitable on its own. Investor confidence in the sanctity of the $37 trillion futures market was shaken by details of…