If you do go the mycelium brick route, there's something I've always wanted to try with that. Assuming you have access to a vacuum/pressure setup, what would happen if you ran the resulting brick through the whole wood stabilization procedure? I've seen people put some pretty wild stuff through that process (like a slice of bread), and it always seemed like this would be a good fit. Eventually somebody'll probably figure out some kinda α-pinene based alternative to PMMA for infusion too