Honestly, not to be a smartass, but whenever a "can it be done" question like this comes up I always point out that the things are originally made from ground up and melted rocks dug out of the earth, so yes!!! it CAN be done, the question you are dealing with is how easily and what are your other options. Take a real good look at how that glass is held in there. I'd check mine out but it's dark and my bike is mostly together right now so I'd only be able to see the outside. If it is held in by pressed aluminum (magnesium, uranium?) around it you have a challenge but o-rings or rubber or adhesive seals might not be too tough to replicate. You could even fab up a plug with a dipstick in it. Best of luck.