Nestor Molina has made a living looking for Honduran workers to pick fruit in Florida. Now, some of the workers he recruited, their lawyers, and the U.S. government are looking for him. Molina, 53, is among the middlemen hired by companies to help bring foreign workers to the United States for temporary jobs. The jobs span almost every industry, from agriculture to hospitality, and the numbers of foreign workers brought to the United States have swelled in the past two decades. In the fiscal year ending last August, the government issued more than 350,000 temporary work visas.