On Mon, 17 Sep 2007 09:18:55 -0700, tom wrote:

I have a toilet that has a rigid plastic rocker as the flapper, with
pegs, not holes on the flapper.

This is an old flapper. I wonder where I can find one that will work.

Take old flapper to a plumbing supply house or hardware store and find its
replacement.

If a replacement cannot be found, consider replacing the entire assembly
with a new one. They are cheap and the repair should take less than a few
mintues.