The wood decomposers are not too hard to grow at home - There are many different methods, usually using a sterilised substrate of sawdust, straw, grain supplemented with additional ingredients like flour or coffee grounds.
For this one though, I will probably see if I can do it the brutes way, without the sterilisation and sanitisation and just blend a large chunk of the mushroom with water and mix it with damp sawdust. as the mushroom is so large the mycelium will have a good chance of taking over the sawdust before an contaminants get in.
It will be a bit of an experiment, as I have only ever done it with oyster mushrooms before, so if it works out I will be quite happy.
I'm waiting for some innoculated logs to fruit sometime this season - namekos, lions mane, shitaake, enoki, maitake. I also prepared a morel bed, but it won't produce til next spring if it works, or maybe even the following spring. We will have to wait and see.
If you have some capital, it is easier to grow in your house with the sterilisation method - Try Paul Stamets books - 'growing gourmet and medicinal mushrooms' or 'the mushroom cultivator' for an idea of how to get started.