Every year I promise myself I'll get some blackout linings or curtains for the summer. Every year I walk around the local stores, see nothing that appeals. It all seems too much, and another summer slips by with me not doing anything, awaking too early and feeling shattered by mid afternoon. That said, of late, I'm waking up at some ungodly early time anyway, light or no light :-(
I can only wish you well in your search for an answer and that you actually find a solution. Sometimes I wonder if the only good solution is to put up shutters and close them at night. Knowing my luck though, if I ever did the summer would prove a scorcher and I'd have to open the shutters again for air anyway.