Glass Wax was manufactured by Reckitt Benckiser and was discontinued in 2003 due to low demand (I am told). They have a toll free number to call 1-800-228-4722 for product information. I asked if they would consider manufacturing this glass wax again and I was told it might be possible if people start asking for it again, (increase in demand). I always use this wax to clean windows and I don’t like to use anything else.
If enough people call and ask about it, maybe they will consider making it again?
Hope this helps.