Copy and paste LCD's sprites

Dear all,
I'm looking for a way to "copy and paste" a LCD's sprite, in order to duplicate it in another position of the LCD.

I need it because I use LCD to show a waveform, and I'm using something like modsquad to read it in different position. So, I would like to display the result waveform on an LCD.
Every sprite is a set of something like 300 linesegment (it depends on the BPM parameter)

I'm thinking about storing every "linesegment" of the waveform into a javascript array and then recall it, but maybe somebody thought something less complicated...