Stretching my memory I think I remember that problem. I believe what I did was to get a fairly thick piece of felt and cut the inside hole to fit the socket rather tight and the outside diameter large enough to keep the glass up. Took a few cuts to get it all correct but never had a problem with them falling during travel. Just cut the outside large enough to wedge it together. Found the felt in the sewing isle at Walmart. Good luck
Bill
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