I found white refill pages at Michaels today, however the pages in the seaglass album I have are cream colored. Since I plan to fill the sleeve with a colored paper and the white wouldn't show, I thought it would look fine, but now I am thinking that you will see the differences from the sides, and I am not sure I like that.
So my choices are to keep looking for the cream, or replace all the pages with the white and save the cream to use in another book. This is my first scrapbook done totally on my own, and I kind of like the smaller sizes. The 12 x 12 size is still a bit intimidating to me, and the smaller ones don't scare me too much, so I bet I will do another one and will be able to use the cream pages.