We suspect that while it could be MGHS for Bullock, it's probably BL.
Now confirmed, but at least it's one that's new to Buzzr (ep 357, OAD 10/29/85, Bullock and Mindy Cohn). The other ep is labeled as 214, which has been shown before.
Two B&W WML eps (Judy Garland and Barbra Streisand) and two color ones (the aforementioned 1970 Lily Tomlin ep as well as a 1973 ep with Jim Bailey). And the Lynde IGAS (as well as CNR's where he paints Janice Pennington's body).
Among others.