DX4000 Drives no longer available

Actually neither cdw nor does bhphotovideo have the drives.  There is no place in the entire country that offer this drive and many retailers say that it is either “discontinued” or “deactivated”.  I’m wodering if there were so many returns that WD ran through their stock prematurely.

The 3TB version is available but then we are just wasting an extra $100 for 1TB of capacity that can’t be used in a raid 5 configuration. 

It would be nice if we could get additional information on the future availablility or a good trade up program. If the 2TB drive is indeed discontinued, I’d gladly trade in my existing good two 2TB drives and 2x$100 for two 3TB drives so I can purchase an additional 3TB drive and upgrade to raid 5.

Or WD should at least make DX4000 drivers available for other model number 2TB drives.