1366 is a dead slot type. I could tell you something that would work to keep it hobbling along, but I wouldn't expect too much for future upgradeability in the future if I were you.
For that matter you might as well just get another one of the same kind of motherboard that you already have, that way you don't have to reinstall Windows and delete all your programs and stuff in the process.
You would have equal suckage in the future regardless unless Intel surprises everyone by going back to 1366, then you would be looking like a psychic.