The list of cartoons for the second volume of the Looney Tunes Golden Collection was recently announced, and it will include two black-and-white cartoons. The first volume did not contain any.
While progress is being made in getting rarer and older cartoons restored and released by Warner Brothers, it will still be a long while before they've got Bosko cartoons ready to release (if Warner Bros. releases them at all).
So in the meantime, the two DVDs in the "Uncensored Bosko" series are good for study of early animation, and are actually entertaining. While full of dust and dirt, the video quality is better than most copies of these cartoons.
Also recommended: The Looney Tunes Golden Collection, Presenting Felix the Cat, Walt Disney Treasures: Mickey Mouse in Black and White