ATM 7/8" diagonal mirror source?

[Larry Manuel <lmanuel@agt.net>]

I am 'tuning' up my 6" f/8 Newtonian, and have just put on a lower profile
focuser.  Now I have decided to change from a 1.3" minor axis diagonal to
one of 7/8" minor axis.  I am searching for a supplier.  Can anyone give me
a suggestion?  I know Edmund has them, and might not be a bad choice.  I
would like to consider other sources before I order.

I can have a friend test my new diagonal against a good flat, but that
doesn't allow us to correct it - therefore, I would like to have best chance
of buying a good one the first time.

Thank-you.  I will post my findings - both the source, and optical results.

Larry Manuel, lmanuel@agt.net, Calgary, Alberta, Canada.