Toy Anxiety is your best bet to monitor, as they from time to time break down older stock as well as the newer sideshow releases, although typically female sideshow figures are kept with the bodies unless its a newer release.
I believe Sideshow made some changes with the Baroness body so parts may not be compatible with previous generation. The male heads are transplantable to hot toys compatible bodies as they use the same style head connector, not sure if that is true of their female bodies.
I believe Sideshow made some changes with the Baroness body so parts may not be compatible with previous generation. The male heads are transplantable to hot toys compatible bodies as they use the same style head connector, not sure if that is true of their female bodies.