WD800BB

And another one. One head is dead as it seems. It's more like a training object for me, I've once replaced a head stack in a single platter WD, and actually succeeded.
But this time I have some trouble finding a drive with an identical DCM (HSBHCVJAH). The meaning of the letters for stack swap has often been discussed, but without a real solution. Is there any opinion what I should look for?

regards