use duct tape over size it a bit. To allow for removal.   I did try duct tape it does help ,but not quite as good as the 2 sided foam + cork.

I know the felt round will help I just could not find any the day I did it.

Also set the buzzer to false as this drops the amount of beeps by 80%.

  then the tape/padding lowers the sound more  it still makes some sound  just much lower and it will be easy to set back to stock.