Coude mask maker?

A year or two ago I ordered a 16" coude mask from the internet for Foucault testing but can't find him now. Club member wants his 12.5" mirror tested and would prefer just to have the mask made...anyone have his website or another who can supply the same thing. Can calculate and cut it myself but wanting to take the lazy way out..also think it may be more accurate.
Thanks in advance...
Alan Thometz