Cigarette Lighter Adapter- Cessna 172

I attempted to plug in my portable GPS unit into a 2003 172 and ... I
couldn't. The "standard" cigarette adapter has been replaced with a smaller
something. I didn't have time to look too closely as to what the new outlet
is. The GPS was just a backup and I was just going locally .

Question. Anyone come accross this ? Do you know what adapter I would need
to continue to use the "old" cigarette size plug ? Who sells them ?

Thanks in advance.