If you want to complete your Alfred Hitchcock Presents and The Alfred Hitchcock Hour collections, then you need to look to Australia, where Madman Entertainment have released complete collections of both series.
If you just want to own the episodes that were actually directed by Hitchcock, then you might want to treat yourself to their 3-disc “Alfred Hitchcock Directs” collection. As an extra bonus, it includes the Startime “Incident at a Corner” episode. It’s not quite the “complete” collection though, as sadly it’s missing the Suspicion “Four O’Clock” episode.
The set is available from most Australian suppliers, as well as from the Madman web site.