Did you ever try Sinequan? It's an older a/d. I'm not bipolar but I did have severe insomnia with major depression years ago and it worked great. That was after trying Tylenol 3, Seroquel, Ambien, Deseryl, remeron, etc.
40 yrs young
dx UC (pancolitis) Dec 03 then re-dx to Crohns colitis April 04 then re-dx again to UC Dec 07-currently taking no meds and in remission