if you want to stay with a cloth cape why not the cape that came with the ROTJ Jedi Luke, dye it black and cut off the hood part if you don't want that.
the only thing i don't care for is the silk-type material cape with the vintage style....Kenner used "cheap-y" materials like the vinyl & the "expensive" stuff was the cloth like on the Jawa or the Jedi Luke or Luke/Leia/Han Endor/Battle Poncho.
I'm not trying to be critical at all...I love what you have done with the figure itself, and if you like the silk bend-ems cape stick with it. keep up the good work.