Companies that provide audio digitization

In the last two weeks, I've had two inquiries about audio digitization. I see that there was a question on the Archives and Archivists (A&A) List yesterday about this. (It is the current universal hot topic?) It was noted that there is a directory of "Association for Recorded Sound Collections (ARSC) members who offer services for audio preservation and restoration, as well as ARSC members and non-members who offer equipment and supplies for audio preservation and restoration." While the list may not be comprehensive, this would be a great place to start for anyone interested in audio digitization.  Inquiring with local symphonies and sound engineers might also surface additional resources.