I've used Sporeworks to buy... other varieties... of mushroom spawn before. Their spores were fertile, and it looks like they sell oysters alongside their other offerings.
I'd love to find some oyster mushrooms that are acclimatized to Vancouver Island. I just moved to Victoria and I'm looking to do something with the sad apple tree stump in my backyard. Just highjacking this post to ask for any good local sellers, or, if anyone is particularly trusting, the location of a small patch of oysters in the Victoria area that I can harvest.
Thanks to anyone, and happy mycoremediation