I decided that the original lens had way too much crazing and needed to be replaced. So I took some one sided sticky clear plastic sheet and copied the old existing lens while it is still in place. Then I transferred it to a piece of left over smoked plexiglass glass. Cut in with a very fine tooth band saw blade, sanded it and finished it with a 1/4 round on the router. Final sanding was done with a scotchbrite scrubber to make it a smooth finish but rough enough to let Dow 295 adhere to it. Now it's waiting for the day to be installed.