There was indeed a 2-on-1 release on Vipco of the
Bronx Warriors films. Amazon have it here -
Bronx Warriors
Vipco also released 2-on-1 DVD's of
A Blade In The Dark/Spookies,
Pranks/God Told Me To (aka
Demon) and
Suicide/The Dungeon. These are all deleted titles now so they're probably worth getting for your collection if the prices are good. The prints are the same as the solo DVD releases.
The print of
Pranks is the previously cut video/DVD release alas. Other than that all the above titles (inc the
Bronx Warriors films) are fully uncut.