Kaisercraft have these gorgeous advent calendars out. They come as a flat kit which you put together yourself, but they are so well-made that it's a very easy process.
I bought these as a kit with the papers (Christmas Carnival), paint, bling etc all supplied, and I have made 2 for the grandkids, and have yet to do the one for our family. And I havent shown the LO in this calendar as it is a gift for someone!
I havent been able to get a good photo of mine, so I'm including 2 pics from the Kaiser website as it shows the raw calendar, and the example made by Melissa Kennedy.