In 1993, Manley Laboratories, Inc. became a separate entity apart from VTL. The new Manley Labs factory at 13880 Magnolia Ave. in beautiful and bovine Chino, California
After only three years with Manley Laboratories, co-founder David Manley abruptly left the company and the country in 1996. With EveAnna Manley now at the helm, the modern form of Manley Labs began to take shape.
Your right Eve-Ana Manley took over the VTL factory after David passed.
And it became Manley Labs and in 1993 she separated from VTL, they must have shared the same old factory.
https://www.manley.com/history
Cheers George