Yes I have but it was more a template then a stencil. I broke the motif down into sections and cut templates out of stencil plastic to use to transfer the motif to my quilt.
Another motif in the same quilt I drew my design then traced it onto tracing paper so I could see through the paper for placement. Once the motif was where I wanted it, I slipped a piece of Transdoodle transfer paper under the tracing paper design and transferred it to the quilt with a stylus. This method also worked but I found the transdoodle rubbed off very easily so had to go over my transfer with a fons and porter mechanical pencil. I also had to make numerous tracings of my original design because the stylus tore the paper very easily and it only lasted for about 3 or 4 transfers.
I have read that Saral transfer paper works just as well and is a fraction of the price. I plan on ordering some and see for myself.