I'll get some; are they like LemonHeads?

Hey Amazon has them.

http://www.amazon.com/Screaming-Yellow-Zonkers-Limited-Edition/dp/B0088UIBDW

Except theirs better be solid gold.

Hahahahaha classic (zonker instructions)

"Open the top, and turn the box upside down. If the Zonkers fall out, this is the bottom. If they fall up, this is the top. If nothing happens, this box is empty."

From review.
http://www.sogoodblog.com/2012/05/11/review-screaming-yellow-zonkers/

These things were GREAT for the munchies back in the 60's and 70's. I even had them in Germany.

Check this out Zoomie, Zonkers had prizes too for a while.
http://farm1.staticflickr.com/78/336253223_d837e283d2_z.jpg?zz=1