So it may be too late for you to buy parts from the Ghostbusters Fans Shop but there is still time to make some last minute props from items found at your local hardware store. One great example are by using Welding Goggles to create a set of perfect Ecto Goggles. Don't pay $100 for these things on eBay when you can be making your own for under $20.
Check out these plans for parts and information, its very easy to do:
Check out the Ecto Goggle section for plenty of goggles made using these plans and more: