Honestly, you're gonna have a hard time.
What board are you trying to fit? Many boards have odd-shaped keys or stabilizers that makes it hard to swap.
For example, many keys on a Focus 2001 will transfer to a Ducky 1008XM or Solidtek ASK-6600, but the different layouts of the right-shift, enter, backspace, backslash key area make full interchanges impossible. The Ducky and Solidtek also use a different stabilizer type than a Focus.