Did Operation Fast and Furious have a Tampa twin, Operation Castaway?

The Daily Caller reports:

Republican lawmakers are alleging that Operation Fast and Furious may have had a twin in Tampa: Operation Castaway.

The new revelations have come to light as Florida Republican Rep. Gus Bilrakis fired off a letter to Attorney General Eric Holder and acting ATF Director Ken Melson asking them for answers about the newly discovered program.