Directed by Murray Roth
The Film Registry titles Lambchops and The Beau Brummels (1928/2016) are both available as bonuses on the Warner Archive edition of The Jazz Singer (1927/1996), listed below.
Purchase the Warner Archive DVD from Amazon
Purchase the Warner Archive Blu-ray Disc from Amazon (The Jazz Singer itself is on Blu-ray Disc, the bonus discs are DVDs.)
Lambchops can be seen on YouTube.
Lambchops is or was available in various other editions and/or collections.