Hi Tom,
As you probably remember from your visit to my home a while back, I have the HD-AE5000 hard drive installed in my KN5000. Though the HD-AE5000 is no longer being stocked by dealers, perhaps the manufacterer, Keysoft Service , located in Europe might still have a few left in their warehouse. I suggest you contact Keysoft Service directly: http://www.keysoftservice.ch
The contact person is Roland Schmid. His email address is:
RS@keysoftservice.ch

Good luck,

Scott