Availability of Seal Line Adapter Plates

Looking to find a set of Seal Line Adapter plates to change over sliding rudder pedal controls on a tandem to the Seal Line Toe Pilots. I have a couple of extra complete sets-the adapter plates evidently bring the rails lower from the stock drillings to accomodate the lower foot pedals. Cascade Designs no longer has them. Anyone know of any shops with them in stock?