On Sun, 20 Jan 2008 18:46:28 -0800 (PST), wrote:

My mother has a light bulb socket tripler in her house. I have tried
to find another one, but all i can find is a twin. Are triplers no
longer made?

I'm assuming this is a thing to put 3 bulbs on a single socket.
Otherwise I have no idea what you are talking about.
Take a picture and post it online if you can. I have never seen such
a thing.