Since the Tiara is just a rebadged HandiQuilter Sweet Sixteen, and that is the table version of the Simply Sixteen, you could probably use the handles from Simply Sixteen's "Quilt from the back" kit. That would probably let you rig up the secondary display as well.
Quilt from the Back Kit (HQ Simply Sixteen) - Handi Quilter
You might find those parts cheaper used via the FB Longarms and Accessories for Sale group.