I have a just-under 10" Suprax blank, full thickness, ground and half-polished to F/6.1 Suprax is the pyrex equivalent from Schott Glass. The blank was purchased from Sydney.
I've recently acquired a 12" mirror that should meet my current needs better and I can't see me finishing the ~10" anytime soon. PM me if you'd like to know more details and discuss it further.
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