The Star Wars Book of Masks
I finally managed to find a good deal on The Star Wars Book of Masks, which was released in 1983 and includes a couple of masks from Jabba’s Palace (Gamorrean Guard and Bib Fortuna, to be specific). They’re perforated, so you just need to punch them out and tie on some string to wear them as masks. This isn’t really a rare book, but they tend to be already punched out, so finding one that’s intact is nice. Starwars.com has posted a PDF of the masks from the book that you can print out if you so desire.
Some other posts from the past that might be appropriate for Halloween are my entry from a couple of years ago about the Rubies Jabba the Hutt Halloween costume, and some posts from last year about the Jabba’s Palace chocolates my son and I made, and the Jabba the Hutt and Salacious Crumb pumpkins we carved. I also posted about a vintage Gamorrean Guard costume for kids a few months ago.
Mighty Jabba's Collection 
I had this book… one of the very few childhood SW items I ever owned.. got lost or thrown away in a move !!
No lie. I found one in near perfect condition in a thrift store bin two years ago. I bought it thinking it was so amazing how the masks had never been removed. Still have it. It’s cool.