The lack of any motorcycle shop that will work on a Laverda in Southern California means unless you do your own work it becomes a bike rusting away at the back of the garage.
sadly, that is very true. I am blessed to live in Germany with plenty (well - 3?) of Workshops that do work on Laverdas within a distance of 300km, the closest being OCT with just 80Km away. Piet, who used to work for OCT, has retired now, Roger (the owner) is in his 60's, too, many of the guys that worked for OCT have left for other business and the other dealers and workshops in Germany are run by similar or even more aged people (like Andy Wagner or Bodo Bergmann). Not sure for how long they will be able to service the bikes... Adding to that, the Breganze Bikes aren't tempting to my son (while the Zane is), so I guess he will not be wanting them in the future.
I was on a bike meeting recently after some years again, roughly 200km away from me. Tour was great, a lot of chearing from people that I haven't met for some time. Sitting there, we remembered all the dead ones of that scene, which was good but also scaring to see how many have already gone to their last ride. Looking around, I looked into really aged faces and wondered, how long we will be able to even ride our bikes... Maybe time to sell them off before no-one wants them anymore? They are not complicate and parts are available, but who really cares once we are dead? I think no-one really, at least not the way we hope for. Sad.
Not sure where abouts you are in California, but I know of Richard K. who is located in Pacific Grove close to Monterey. He restored his lovely Jota by himself (among some other nice machines). He could at least help maybe with sources for work. He and his wife are british and travel a lot between the states and Europe (yes, geografically, GB is still Europe...

). Also, when I went to SF some years ago, I had at least 3 people from California who would be willing to meet. Unfortunately, time was limited, so I had only the meeting with Richard and his wife at their location. I can get you in contact via Facebook if you like.