The origin factory for nearly all private label lines is a closely guarded secret. Folks like Savinelli and Peterson don't want consumers to find out they're making pretty good pipes for less than their standard lines.
Same thing with the "Great Value" branded stuff at Wal-Mart and all in house brands. The bags of generic shredded cheddar cheese are probably also made in the same factory that makes Kraft shredded cheddar cheese.