Made these for a pair of Zenni Sunglasses when my wife broke one of the pads. They use a tiny screw to hold them or you can use a tiny piece of wirewrap wire as a temporary fix. They worked well in an emergency.
I used a raft without any supports since the up curve layers are tolerable for my printer (AnyCubic i3 Mega) and it printed well on the Ultrabase glass surface in PLA 200/50 degrees.
I carefully pried them off the raft and gently sanded the rounded top, cleaned out the screw holes with a fine pair of tweezers and they installed very nice.
The wife is happy! Maybe now she'll buy me another roll of clear filament... LOL
Sand the curved nose pads where they touch to remove any burrs with fine grit paper.