Strap for 18mm x 14mm Patek *Deployant* Buckle / Clasp

Anyone have a strap they’d be willing to part with, new or gently pre-owned, that’s made for a Patek deployant buckle? The width at the case/lugs needs to be 18mm, and at the deployant/buckle end it needs to be 14mm for a vintage watch. Ideally looking for genuine alligator in the mahogony/dark burgundy/caramel/gabardine brown color range. Patek deployant straps typically - but not always - are marked with a “D” on the back of one of the pieces of the strap to indicate deployant, where the tip end needs to be longer and extra thin to fit correctly through the Calatrava cross buckle.

Thanks in advance!
Mark
Philadelphia, PA