I scrap 12 x 12" so your topper would be fine for me. I'm probably not much help, but maybe if you have to remake some, you could just remake for the people who scrap smaller pages. I'm sure they're going to be great, though!
It sounds like, from her husband's post last week, that our hostess might be home from the hospital this week. You might want to give it a couple more days to see if you get a response.
Good luck! This should be fun, so you shouldn't be stressing so much. Of course, I say that as I am staying up late to get a million swaps done! LOL!!