Convert your English or Australian rigged saddle to Western rigging.
Sold as a pair, the Cashel Converter™ consists of two English billet buckles (large enough for Australian billets) attached to a Western D-ring on a leather backing. Your saddle billet straps buckle to the Converter™ on each side of the saddle, providing a D-ring for attaching the off-billet strap and latigo.
(Shown with Cashel Breathe Easy® Elastic Billet Strap - sold separately)