If you have one, make a template from 1/4 in thk press board and take it to any glass shop and get safety glass as mentioned. Flat glass is cheap. If you order, you will pay big shipping on top. You can "install" this board first if you wish and if you have the rubber, as a test. I believe your glass will be 1/4 thk.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
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