Yeah, there's a WEALTH of products that have never gotten the Wacky treatment that can still be mined. Worlds to go. I spend a lot of my time swimming through the genre and I can tell you, the vastness of consumer packaged goods should not be underestimated. It's... well, vast, and that's without even getting to the flash-in-the-pan products.
And I don't want to poo-poo album covers (or cassette tapes) and VHS movies as worthy targets of parody, but I really do feel like those things are not great examples of the kinds of subjects best served to become Wacky Packages. Like the magazine offshoot half series (that was conceived as a different set, "Wacky Magazines?") from the OS, it's not that those things don't have merit for parody, but they stretch the idea of Wacky Packages that typically target a different kind of thing - a consumer packaged good or food item, IMHO.
But, as with the magazine half series, it's not necessarily terrible.