Originally Posted by Welshal
I bought one with an olive oil bottle. It was a normal pouring spout and a black plastic ball that fitted on the top of the spout. Cannot find them for love nor money now!!
From your description, I can only surmise that you are talking about devices that look like these
. The pour lids, or "balls" in your description, are attached to the spouts in the link. I've never seen replacement balls/caps, just the whole device sold as one. Hope this helps a bit.