http://www.gmpartsgiant.com/parts/gm...-94858624.html
GM doesn't apparently make the clip anymore -- this was also confirmed by my local Chevy dealer.
So another option is to just buy the driver's inside handle which *should* come with a clip.
part# 94857490
http://www.gmpartsgiant.com/parts/gm...-94857490.html
I wonder if a Toyota Corolla handle / clip would fit ?