The cpu possibly, but I had a hard time trying to find the support chips (ctc, sio/pio, etc)...
Many applications didn't even use those peripherals so I suppose production ended earlier.
The Z80 could even refresh the RAM by itself. It was not like the 8080 which required two support chips only to function.
Do you have an actual use for them? I might have a few tubes of Z80-CTC & SIO in the basement if I haven't given them all away yet.