1969 Dodge Dart - Rear Arm Rest Ashtrays

Has anyone ever tried to cut holes for the original ashtrays into replacement rear arm rests? I am thinking it will destroy the new ones.

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Why does that one on the left look like a 67 style (1 year only )compared to the right one ?
Couldn't you buy a set with the ash trays from a member here I'm sure someone has to have some for sale?