if the print is on the case, not backprinted on the clear section, i would be tempted to ask a glass shop to make a 3mm hardened glass replacement wih rounded corners and bevelled edges
the piece is so small that they could use a bit of scrap from the bin - so you would only be paying for the cutting and grinding.
the car windshield stuff wont work, they have to put a small vac chamber over the glass and suck the air out to use that resin.