The Marvel Select figure of Natalie Portman as Jane, by Diamond Select Toys, has a base that connects to Thor's. This figure was shown at Comic Con, but no photography was permitted then - I can say it's a good likeness, and enough to hold Portman fans over until Star Wars Black does Padme.
Sorry, Kat Dennings fans - you get this:
Sigh. Maybe one day there'll be Two Broke Girls toys. Mezco?
Images via Marvel.com, which has more.