Well, Epson doesn't make glass and they wouldn't recommend a part that was not intended to be replaced, especially for an EOL product.
I don't know how easily you can change it, but for our Screen Cezanne Elite scanners, we had great success with Non Glare Acrylite P99(recommended to us by Michael, from ScanSolutionsOnline)
You might want to try using Gamsol(Lumina) or even high viscosity minerail oi(much harder to clean) directly on the bed, a few drops above the film and cover with AZ42 Mylar (Kami in Europe, Aztek in the US). You will find it works wonder in filling in fine scratches on the glass or on the film(non emulsion side)