I use to buy the pre cut ones here:
paperpieces.com
I had a hard time removing the plastic ones. A quilting friend showed me how easy it was to sew and join the hexes all at the same time without using the templates. It's so much easier. She said that was the way her great grandmother taught her mother and her mother taught her. I'll try to explain how I do it. It's very basic.
Join two hexes right sides together and stitch 1/4 seam starting 1/4 from the end and ending 1/4 from the end. Add another hex to another side of one of the hexes already sewn and repeat. It's fast and no stitches show at all. No basting or whip stitching.