Yep, they are available all over the place. And usually they have a 2 for $x or 3 for $x deal that makes them a little cheaper per topper. They can be found at World of Disney in Disney Springs, all the major shops in the parks (Emporium at MK, Mouse Gear at Epcot, Mickey's of Hollywood in HS, etc.), as well as other shops throughout the parks. I have used them on my last two cars, even though the cars have had the thicker stubby antennas. Like a previous poster mentioned, you can always carve out the hole to make it larger if it doesn't fit on your antenna right away. Makes my car easier to spot in parking lots and gives it a bit of Disney spirit!