Originally installed by the factory on all 73 1.7 models with a less than 1000 serial number and featured in the 914 restorers guide to authenticity, yes this was original equipment on your car!
If you want to do it yourself, and your cardboard door panel is good, here is a right passenger brick weave door panel recovering kit! consists of the smooth bolster sewn to the brick weave and sized to perfectly recover by just using a shallow staple gun.