On one of recent ebay searches, I came across a vintage leather writing case. What is this wonderful thing and why have I never heard of it? There are tons of different sizes and colors. I found this one (above) for $5. I'm still impressed by the deals one can find on ebay.
You can move the calendar to coordinate the current month and there's even a pen clip :)
It zips up, and is the perfect size and condition.