No I haven't made one from an old regular shade. I think you would need a little more weight to the shade than what that would provide. But, I am sure anything is possible if you are determined.
I enjoy my topper with a regular pull up matchstick type shade under it. That way you have some décor while enjoying the sunlight during the day. I also use a topper with the white wide wooden blinds. It works great.
Check out the major pattern companies books at the fabric stores. (or on line) There are many styles of coverings you can make to suit your style.