Mr.  John Rodriguez  asked on  Wed, 18 Sep 1996:
>I am interested in locating a supply of 4" diameter Corning 7740 glass
>wafers (approx. 30 mils thick).  I have tried Mooney Precision. They are
>out of stock.

I got an offer from German Special Glass AG (Deutsche Spezialglas AG):

Mr. M. Krause
Technical Glasses
Deutsche Spezialglas AG
POB 2032
D-31074 Gruenenplan
Tel. ++49-5187-771-286, fax -547

They say, 30 mils were not their standard thickness but posed no
problem.

Good luck, Kai