http://www.moddin.net/project.asp?projectID=2
Original site has long since disappeared into internet oblivion, I think.
I think someone also posted something in the gallery forum a while back of a case he 'designed' that looked frighteningly similar. Almost as if he'd lifted the plans for...
Are you sure you're not thinking of data connectors?
Most of the S-ATA power connectors I've seen are solid. Only way they're coming off is with some clippers :o
We (my site) still have them hosted from way back when Coolhand did his original X-Box controller mod.
www.enscape.net/xctrl/XCtrl.zip
They'll be sat there indefinately, so grab them at your leisure.
I was considering putting a keyboard tray on my desk, but after giving it more thought, I realised I never really needed one to start with. Much more comfortable without (especially since I tend to lean on whatever the keyboard is sat on).