I just received an email from the Warner Archive that they are releasing Between Two Worlds on DVD. When I clicked on "Shop New Releases" it went to the previous group of released films, so you may have to give it a day or so.
Can't wait!
Update on this. The web page now has the film available for purchase.
Important Note: This film has been manufactured from the best-quality video master currently available and has not been remastered or restored specifically for this DVD and Digital Download release.
So, expect some flaws. Personally, that just makes watching old B&W films more "authentic".