Were those Sony drives that died of CapLeakage?
Looks like they've got another one for sale:
http://www.ebay.com/itm/Vintage-Apple-Macintosh-Sony-CDU561-25-CD-ROM-Drive-Caddy-Load-/140912539408
Looks like they've got another one for sale:
http://www.ebay.com/itm/Vintage-Apple-Macintosh-Sony-CDU561-25-CD-ROM-Drive-Caddy-Load-/140912539408