The original black and white version of this film was released on the "Looney Tunes Platinum Collection Vol. 2".
You may find the 1968 color version on DVDs from small distributors. This copy, poorly retraced from the original, seems to be in the public domain, which means any distributor can legally release it without paying royalties. Note that the 1992 computer-color version is not in the public domain.
See also: the alternate versions page for this title