Check out ebay.
https://www.ebay.com/itm/Connect-fav...kAAOSwT5xZOa-B
I bought this as a backup as my keyboard was bad when I bought my Amiga 500. I went and bought another membrane hoping that would fix the keyboard issues I was having. It did. But the membrane must have been bad as well. As it fixed some keys that didn't work before and it had other keys that didn't work. So then I bought a working keyboard off of ebay. But bought the circuit board as a backup. Works great with wireless keyboard.