I have a Losmandy Universal (DUP) mounting plate I no longer use. It came as a part of a refractor package I purchased here some time ago. It is in excellent condition and has both of the stop screws. There is one small additional tapped hole at the end of the plate.
I'll sell for $55 which includes shipping in CONUS. I'll take a money order, PayPal plus 3% or a personal check (wait for clearing).