I've not tried Thresh Seed out of IA, but they carry the Pennsylvania Dutch that looks the same as the Neck Variety
https://www.threshseed.com/col... and are registered to ship into California. I added a link in my October calendar to buy it for next year. This year I'll say a prayer over the two seeds I have and probably go again with a few of the Tahitian simply because I have it. I'll just remember out of all the winter squash I grow to use them first.