Speaking of Jet Dream…
Fox Force Five = Kill Bill, but Jet Dream came first.
While Jet Dream and her Stunt Girl Counterspies appeared in only one comic under that title, the character was a long running backup feature in Gold Keys version of The Man From U.N.C.L.E., where it was done by Mike Sekowsky and Mike Peppe and I think perhaps sometimes Joe Certa. (?)
As for who owns the character now, I have no idea.