I have found a way to do this and it is virtually undetectable as being repaired. I built a tool to install the new lens. The new one has to be polished or ground with a diamond wheel to make it fit and not bind. I have perfected my method after breaking about 20 of the new lenses. You also have to have a quality lense not a thin cheap one. I will replace a lens for you for $80.00 plus the cost to ship it back to you. I charge only the actual cost for shipping with insurance and delivery confirmation. If you have a nice Pam thermometer, it is worth the money to have the glass dome replaced and restore it back to it's original condition. I have perfect feedback on eBay, you can check me out at, msullivan8hmk on eBay feedback. Before you ruin your thermometer by making it a two piece one let me repair it or sell it to me. We have a love for clocks and thermometers and hate to see them repaired improperly!