Here was an unexpected surprise: Looney Tunes: Mouse Chronicles is on iTunes- or more specifically, the main program content (the 19 shorts); the unrestored bonus shorts (Mouse Mazurka, Mice Follies, etc.) are not included. They are presented in HD. Cost is $14.99.
Of course, some of these are also on HBO Max by now but still thought it was worth sharing for those who don't have that service yet.