See if this works with your machine
Formerly Arc A Templates
Made from .25-inch thick quality acrylic. Six arcs in three rulers. Find the best curve for your needs. Use with the HQ Ruler Base and HQ Sure Foot.
Ruler Dimensions: Ruler 1 - 11.5″ x 5.5″, Ruler 2 - 9.5″ x 4.5″, Ruler 3 - 7.5″ x 3.5″. This is the actual size of the rulers, not the size of design that will stitch when used with a longarm sewing machine.
Part Number: HQC HG00564
Guaranteed to fit because it is a part.