I talked to a Vortex guy that I know this morning because I was interested in an 8x42 to keep in the truck. He said that the current Diamond back has been discontinued and the replacement will be out in the spring and that if I do a bit of looking I should find the eights out there. Vortex offered both to retailers at deep discount and quite a few took them up on the offer.
FWIW, I purchased a Vortex Viper 6x32 for about 1/3 of what they had been selling for when they upgraded to HD glass in that line and it is my most used binocular.