Cut a piece of a lead wheel weight and whittle it down so it fits the hole loosely, and tap it into place with the ball end of a small ballpeen hammer. A big lead split shot fishing weight would also work well.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!