Reuters: The surge in popularity for small cars and fuel-efficient hybrids has left Toyota Motor Corp facing an unusual problem: deepening shortages of popular models such as the Prius hybrid. A limited inventory of small cars hurt Toyota, which reported a 11.5 percent drop in US sales in June. In stark contrast, Japanese rival Honda Motor Co reported a 13.8 percent sales rise on record demand for its Fit subcompact car and Civic sedan. Toyota executives said a dwindling …