There is a nice looking proton pack for sale on eBay. I’ve seen this before on eBay. I don’t know if they didn’t sell it, or this is another one. Still, it’s pretty cool!
After doing a little digging, it seems to be a different seller. The previous listing is still available at the builder’s site. You can also check out the build diary. This is one impressive prop… if only I had $700 lying around, I could be Egon Spangler for Halloween!