you should love it, it's one of yours. Tony gave it to me a couple of weeks ago so I could copy it. It seemed to be the favorite last year. I procrastinated on getting the foam and now looking for some around here.
If you don't mind the color, you can buy round weather stripping by the role at most hardware stores. I've made some pretty cool bass poppers from it and use model airplane paint to make it the color I want. It's gray to begin with and comes in many diameters. Cheap, too.