This scene is from Hawkgirl #58. I'm glad that comics today are still using sleeping gas. It is very reassuring.
The folks at c3c are generally good when it comes to KO scenes. If there is a KO involved in DID they will usually post it, although people somtimes have to request it. It's a good feeling when you open up your email and there is a gas scene staring at you. I love life.