So sorry about your condition, Hope you get well soon.
I was looking and brainstorming and have used the binder option. But this was to keep scraps in, which looked messy because the scraps were all types of paper and sizes.
You can make your own size binder using covered cardboard for the covers.
See this site-http://www.judyofthewoods.net/dcmc_binder.html
For paper how about card stock? It comes in 80 lb. If I were to make this, I would buy the rings (they sell them separately at any office supply)