I hate to break the bad news but they are very common here, they come in a few shapes and sizes and from almost green to clear and purple, you can even get them with screw threads so they went for a long time. I'll take a photo of a few different ones in the next few days and post it.
I had no illusions about Kovels' being right on this one... I thought maybe it'd be worth more, but for the price I paid, I got a nice cure in a nice color: it'll make a good addition to my fledgling "Peppermint" collection!