I got mine from My Embroidery Haven Yahoo Group. She had a ton of free shapes that are for applique, but I use them just for shapes with satin edges. I don't think I have any that are just straight stitches, but I think if you use an applique shape and just use the "stitch down" thread that is the first thread in an applique, you could get a straight stitch.
I have those designs and use them often. I haven't been to her site for a long time and don't know if they are still there. I use them a lot. Suz