No blame meant. Thanks was intended. Just my frustration after all the research and requests over the last three years for a C1/C11 refresh, I give up. There seems to have been some good baselines for a refresh, but then after reading all the changes and differing opinions/arguments, I gave up. I still have the amps which were rebuilt as a result of the good knowledge and experience from this website, and will continue to "proudly" use them. The preamps are still operational at some unknown subjective level of degraded performance and will continue to be used in the short term. I have the ability and equipment to do any of this work, but choose at this time to leave it to an established business with experts who may still be doing this work, for which I haven't found many, other than the one quoted, for the preamps.
This thread can be used as a reference for anyone else looking to have a C1 or C11 rebuilt/refreshed in the future.
The Emotiva XSP-1 seems to be a unique option, other than the C1 and C11 to me, to extend the use of the good two channel systems shown on this site for home theater use.