In article
,
EdDataFix wrote:

How could you cast a mold for a gear that has a quarter of it missing.
It is plastic gear
for a a printers fuser in a micro film reader. Part of the circle with
the gear teeth is missing.


Thanks EdDatafix

You don't need a mold, just contact your local 3D printing shop. I don't
know how spendy a one-off would be, though.