my attempt.
I made the outer mold, then took the original cover off the frame and lined the outer mold and cast the inner mold. The leather was immersed in water for an hour and vacuum formed over the inner mold. The vacuum was left running for 30 min, then let it dry slowly. Mount it on the saddle frame and trimmed for the chopped and tied style.
I used steel fittings to match the shiny effect I am seeking for the build.
This saddle frame dates from 1948 and the frame has been chromed.
I also laminated another section of leather under the saddle.
Hardest part was sourcing the leather.