Hi, Dan,
The only door toppers I have seen were all intarsia style like the
Judy Gale Roberts pattern that crusty59 linked you to.
Please visit Judy's page at http:intarsia.com and look at some of
the projects and how they are made.
Here is a link to some of her FREE patterns that you can try
http://intarsia.com/shop/product-category/patterns/free/If you want, I will try to make you a simple Christmas themed
Intarsia style door topper. Not sure how long it will take but,
you'll have plenty of time to cut it before Christmas.
God Bless! Spirithorse