Those targets were available directly from Winchester a few years ago but I've not seen them in a long time.
You can get the targets that we use for still target shooting directly from the NWTF. They have a 10" ring and a 3" ring in the middle of a realistic turkey head neck area.
They also have a space for date, gun used, ammo used, choke used, shooter, etc. Those targets are pretty inexpensive and especially when used with some butcher paper behind them are great for patterning.
Thanks,
Clark