Wendy did you get a reply to this? I'm in the same boat as you and I'm here in Menlo Park. I Tried for mercy at the Pal Alto service center when my 2013 P85 battery stopped taking a charge 2 weeks after the warranty expired (expired 9/21/21). I stopped driving it with 130 on the battery and with the slow drain every day, I have 90 miles left until it's completely dead.
The Service center folks are all super friendly and act like they care but at the end of the day the shop manager says he can't do anything because his hands are tied by the regional manager. All they offer is the $25,000.00 HV replacement or $12,000.00 refurbished replacement with a 4 year/50,000mile warranty. Gruber in AZ isn't really a good way to go IMO since you'll pay 5-6k minimum for fixing a single module (more bad modules will increase the price) plus you have to pay to truck it to and from AZ to have the work done. I'm assuming that fix will run in the neighborhood of $8k-$9k and the downside is they only provide a 1 year warranty plus they are backlogged 6 months on the Model S.
I'd love to hear how you are progressing with the service centers here on the peninsula? I would really like to know who the regional managers are and how to contact them.