Where do I find a backplane for my case's cage?

[oldtroll]

Hello, how can I add hotswap backplane to Hdd cage currently without a backplane -
or possibly remove OEM cage and install new cage w/backplane. I really need to know what to search for. Locating the parts has been difficult as I lost accidentally, the only page I found having the part I need.

 

[Emerald]

more info!!!

 

[WyomingKnott]

Here's a wild guess, but Emerald is right: we really need more information.
My wild guess is a "backplane" for 3.5" HDDs that fits into several 5.25" bays. I personally use this kind of things for hotswap disks - don't know if that is what you are after or not.
http://kingwin.com/products/cate/mobile/racks/kf_3001_bk.asp