I wish I could help you but we just buy the blue $6.00 autograph books each time we go. The kids use those.
Our last trip, I decided that since I was always going to be standing in line with the kids, I may as well get autographs too. So I got a book too.
This was for 2 reasons: 1) if anything happened to one of my kid's books during our trip, I'd have that extra book for them.
2) I got a book with spiral pages so that I could tear them out. Then when we got home, I could use some in a shadowbox, scrapbook, etc.
I'm sure someone on here will have some ideas for you.