The last Cendyne 48x12x48 drive I bought was from Staples, an AOpen CRW4850.
This Cendyne rebate expires tomorrow, 12/24.
Officemax.com still shows backorder status when I checked a few minutes ago, but I was able to call in ( 800-283-7674) item #20182491, and have one sent from Boston, which at the time showed 9 still available. DOn't know if this incurrs a shipping charge or not, I was told "usually not on small items", they'll call if there is additional charge.