Just got a call back from Mr. Shively, this morning. He said they're located near Marshall in Point Reyes, about an hour north of the Golden Gate Bridge. Their showroom apparently isn't a "walk-in" affair, before you visit, he'd like you to all and get an appointment. His number is on this page:
For future generations, perusing this in an archive, looking for information - if the above link ever goes dead, email me and I'll mail you the phone number back.
-BAT