It lists them as mini uzi stocks, is that correct? arent they for the full size?
If you look close, you'll see the area where it attaches to the receiver is shorter than the same area on the type 7 stock, which is for the full size. Which means you'll need shortened hardware to make it complete.
That hardware is not something I've ever seen available. But even if you did find some, or modify full sized hardware to fit the stock, the rear attachment point on a full size UZI, which is where the rear of the grip stick attaches, is too far away for it to work.
But I do suppose you could modify the hardware from a full sized UZI stock to fit the type 8 mini stock and get it to work with a Mini UZI, and that stock would be more comfortable than the folder. Just like it is on the full size.