Yes,
You can still find it in some stores or Amazon:
[ame=http://www.amazon.com/Jiffy-Pop-Butter-Flavored-Popcorn-4-5-Ounce/dp/B000CSKKE6]Jiffy Pop Butter-Flavored Popcorn, 4.5-Ounce Units (Pack of 24): Amazon.com: Grocery & Gourmet Food@@AMEPARAM@@http://ecx.images-amazon.com/images/I/51cz3q3ln1L.@@AMEPARAM@@51cz3q3ln1L[/ame]
Walmart
http://www.walmart.com/ip/Jiffy-Pop-Butter-Flavor-Pan-Popcorn-4.5-oz/10308562