FWIW, Scottrade lists my CYSG holdings as "CYSG#" although it also makes it as if it never existed (won't come up on searches or as a ticker symbol).
Another recent dead stock that I have CC*G shows up as "CC*G##" with two pound symbols. But it is a fresh kill and still has some info on it when you click the symbol.
Not sure what the significance, if any, one "#" is as compared to two "##" for Scottrade, but for those never say die types around here, maybe it's another little glimmer of hope for you.