Yes, look on eBay or replacebase. For now put a piece of sellotape over the glass to stop more dirt getting in.
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=== Update (10/06/2022) ===
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Safest way to avoid getting more dirt and possibly damaging the camera is to remove the back cover the apply heat to the glass with a hair dryer or hot air station then pushing the glass out from the inside. Riskier is to apply heat then pick out the glass with a craft knife or tweezers.