Mostly the same than thingiverse.com/thing:106281 but for glass that's easy to find.
Mind the zero height of the Z stage!!
Because the glass is 2mm thick you'll need to either install the build platform 2mm lower or trigger the Z end-stop 2 mm earlier!
Use ABS! and give it an acetone/acetone-vapor bath.
The parts will warp due to the heat of the build platform but this should no be severe enough to have any bad consequence.
Do not use PLA! unless you'll never use the heated build platform.
This time the clips are not in the way of the nozzle(s).