Ran a quick check and found the Q60 5x7 target is listed as discontinued by the mfgr (X-rite/Kodak) at B&H.

although they do have it used or demo in a set of 35mm film, 4x5 film, and 5x7 print targets for just under $200. has it for $57.00, RPImaging for $47

I'd guess there are still some in the retail channel for purchase, but you may have to look around. I haven't found any official Kodak info on discontinuance or a replacement product.