Eles não buscavam todos, mas não tinham um mundo exatamente (os escritores pretendiam que houvesse abandonado essa idéia mais tarde), ao invés disso eles tinham "A Colônia" - link
Since the colony is destroyed in Daybreak there is no longer any Cylon "homeworld" out there. And with the loss of the resurrection technology any surviving skinjobs who were out and about in the universe would die off and without the ability to procreate they wouldn't be doing any evolving.