Broken MBP key, spring/cup broken

[r23w]

I was cleaning my MBP keys and the spring/cup that pushes the key back up tore in half. So the key no longer works, so I removed the cup. But now every time I press a key next to the B key it outputs that key and then B.

I am wondering if I use a spring/cup from a different macbook, will it fix the B key, and this repeating problem? I tried pressing the key with my finger/screwdriver with and without the cup on it and it did not output B.

Thanks

 

[szarkupacka]

i ordered from here a new key with cup.
http://www.laptopkey.com/