I’ve received this kit from Mackenzie Yeung. Here’s Mack’s description:
Paper craft Proton Pack as seen in Ghostbusters and Ghostbusters 2. It is about 7/10 the size of “The Real Ghostbusters” proton pack toy. Despite this, it CAN be wearable.
Meant to be printed on card stock or photo paper for durability.
Number of pages: 11 with 1 optional template
Number of parts: 18 with 2 spare parts
Proton Pack: 7/10 BASED ON TOY – 11 x 7 inches
Proton Gun: 9/10 BASED ON TOY – 13 1/2 inches
Download it from the Ecto-1 page