I have purchased several Husqvarna feet from sewingstyle.com. They have a couple different 1/4" feet
http://www.sewingstyle.com/Husqvarna...sser-Feet.html
FOr 1/4" piecing, I always use the edge stitching foot. It has a flange on the right side of the foot. I move the needle to the right to give me a 1/4" between the needle and the flange. Then I sew with my pieces lined up against the flange.