  We derive an integral convex combination of product states for a range of
separable Werner states. Our method consists of expanding the sought-after
local density operators in terms of Wigner operators. For dimension d=2, our
decomposition holds for the whole separable range of Werner states, while for
d>2 it is valid for a subset of separable Werner states. We illustrate the
general method with the explicit examples d=2 and d=3.
