you can try seaching around, I remember one case had huge plastic handles that hold the videocards to the case tightly, to prevent bending.
or you can just tape it on. duct tape solves everything, after all, as you may or may not know.
i rigged up my own hdd cage, because the case that my friend gave me didn't have one. it consists of aluminum, paper, tape, and a fan
my machine is a frankenstein. and i love it.