Since you already have the built-in stitch regulator, any frame built for use with a home sewing machine will work for you. The frames for the Viking and Pfaff machines are manufactured by Grace, for instance. They may have also manufactured the one for Bernina, I'm not certain. You can get a decent price on these at allbrands.com. Just a note of caution. If you want to quilt larger heavier quilts, go with a better built frame. The rollers on the cheaper frames tend to bow with the weight, making the quilt looser in the middle than on the ends. Also, because of the size of your machine's throat, you may need to turn the quilt around halfway thorugh it to maintain the ability to stitch larger areas.