Richard,
I live in Orange County, CA. I checked with Progressive & they weren't the lowest quote. The lowest quotes so far have been with Safeco Insurance, that 3 different insurance brokers used. You may want to try Safeco, AAA, & GEICO website (the GEICO office I called gave me a quote more than twice as much as their website did, & there's a phone number to speak with someone at the end of the quote page on their website).
Just like you, my present (car) insurance company has increased my insurance the last couple of years, so I'm shopping around -- now that I've gotten other quotes for my car I see that they were almost twice as high as others.
FYI - My Zero S VIN comes up as an MX dirt bike for some of the brokers (except on the GEICO website, where it comes up as 'S SR'). And AAA management input 999cc in their 'Engine Size' quote question, even though they know I have an electric motorcycle.
In case it can help anyone, I'll post the finalized quotes when they settle the classification of my Zero S in their underwriters' systems.