OT: SATA Backplanes drivebays and caddies

Sorry for the OT post but I know a few round here are well informed on the storage industry.

I'm just about to migrate a bunch of PCs to SATA from IDE as the IDE drive caddies are failing [0] and I already have my server and a few PCs using SATA, what I'm looking for is a drivebay / backplane manufacturer that has 5, 4, 3 and 1 slot internal bays available that use the *same* tray / housing / caddie.

The tray / housing / caddie doesn't have to be rugged [1] or cover the whole drive, it would just be *really* convenient to be able to move drives around at will.

My search (below) hasn't helped much, has anyone round here got and suggestions?
sata "removable (disk | drive | harddrive) (caddy | bay | drawer | tray)" single multi

Thanks

[0] I think all ATA removable bays take a bunch of liberties with the
standard anyway and these were cheap and are old
[1] which I suppose by definition means it's not a caddie

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