When you say you can't find it anywhere, do you mean you are looking for a new part? And I noticed your profile says you have a 98 WJ but there was no 98 WJ, so you have a ZJ I think. Only reason I mention it is because maybe you were looking for WJ parts?
My '96 also connects to the driver's side of the airbox though, on the collar that connects to the air cleaner tube that goes to the throttle body. I just tried to look for the part, but you're right, I can't find it anywhere. All I'm seeing is ones that connect to the passenger side of the airbox.
Mine looks like this -