I am listing a few duplicate marbles books and some magazines with marble related covers or articles this evening on eBay. Might be something that you are looking for. Will also be listing some marbles soon, probably over the weekend. Thanks for looking.
https://www.ebay.com/sch/arasmus/m.html?_ipg=50&_sop=12&_rdc=1
Top pic looks like cat's-eyes - hard to tell which maker from one view. 2nd pic from bottom, left one (green w-yellow stripes) fits in the Imperial packaged type (made in Far East) - newer.
Here's "flyer" info for the show. I know a few people from the Seattle (Tukwila) Show that just ended today mentioned that they were goiing to the Las Vegas Show.