You won't find feet specific to your machine unless you happen to find a used set on Ebay, etc... Low shank generic feet are easy to find. This site has several different quilting/darning/hopping feet, you might want to get a couple different ones to find out which one your machine will play nice with.
http://shop.sew-classic.com/Low-Shank-Feet_c5.htm
I free motion with few different machines and each one likes things its own way. Some I drop the feed dogs and set the stitch length to zero, some I don't. Different machines like different darning feet, heck I even have one clone that I leave the feed dogs up, leave the straight stitch foot on it and just lower the presser foot pressure so I can move the quilt around under the foot.
Cari