Where to get plastic drive guides for oldworld 7200

[Mike Fedyk <mfedyk@matchmail.com>]

Hello,

I have several 7200 PPC machines that I'm adding hard drives for raid1.

One little problem.  I'm running out of these plastic drive guides.

I doubt that Apple is still selling them, and I'm not sure where to start
looking for them.  Can someone point me in the right direction?

TIA,

Mike