I know of this one that I've ordered at the time, but was cancel before it's released for a question of copyright.
![](http://img.amazon.ca/images/I/51b0XBDABUL._SL500_AA240_.jpg)
The only copies existing are the screener send to the web reviewers, so maybe less than 50 copy exist actually.
Of course I own it trough the Mario Bava Collection 1, but this unreleased one had a commentary track from Tim Lucas.