There is a new edition of her _The Origin of Capitalism_, published by Verso. Have you checked at Amazon or Barnes & Noble? I have the cloth edition; I don't know whether it is out in paper yet. If you don't have her _Retreat from Class_ it is worth whatever you have to pay to get it from a used source through a web search. My own opinion is that it and _Democracy aganist Capitalism_ are two of the most important books by any contemporary marxist. _A Trumpet of Sedition_ by her and Neal Wood is also very good and I believe still in print.
I've practically worn out my copy of _Peasant-Citizen and Slave: The Foundations of Athenian Democracy._ Carrol