The first two pictures show new ivory laid out on the desk.  The picture to the right shows the plastic key top as it is cut off on the band saw.  Note that a special precision jig is required to do this procedure.

The cut key must be absolutely square.  Then the ivory is "laid out" so that it fits perfectly.

Then the new ivory is installed using a special secret glue.

The pictures below show some of  the many stages of shaping the ivory, followed by sanding to 2000 grit and the final polishing proceedures. 

The pictures below show the marking out of the notch for the sharp and filing to achieve an identical match from key to key.

After the many sanding and polishing procedures are finished the ivory is translucent and gleams .  Wouldn't you really rather be playing on new ivory and genuine ebony than on cheap plastic keys?   This is the finest ivory work done in the world today and you should take advantage of its availability.  A lot of leg work has been done to find a legitimate source for this genuine ivory.  The value of your instrument would be vastly increased and the basis of your investment, a long term one.  See picture below to view the ivory as it approaches completion.  Please note the exact precision with which the new ivory keys match each other.