I have, and am growing, Santa Clara Canner -- I live in Santa Clara County and am working with as many local heirloom varieties as I can.
I'm also working with Diener (a supposed SCC offspring) and Riverside (
http://www.victoryseeds.com/tomato_riverside.html) which is a SCC cross with Marvana/
I've never managed to come across San Jose Canner, though, and there are so few references to it, it seems to have vanished within a few years of its release.