i use them too, fons and porter has a small pointed one out, my friend got it from joanns, with a coupon of course.
she got it home, and had to take it back, it was dried out! but she does love it!
i use the school ones..kinda messy, but i really like it for string quilts,eliminates the need to press every seam down..
Glad people share thier ideas here! they have helped me many times with thier wisdom,tips and tricks!