Field and Forest Mushroom has a good catalog (lots of info) and can supply everything you need. I toured their operation last summer. They are very knowledgeable and I think you will find them helpful.

Here is a link that might be useful: Field and Forest Mushrooms

You might want to start with a prepackaged boxed version first. In this way, you get to see what is going on while they start to form and what things are used in the growing medium. I bought a box of these several months ago, and I'm still harvesting nice big white mushrooms. They are slowing down now, but thats Ok, as I got at about 10 pounds of them from the setup already.

Here's an interesting link I found.

And the link is...?

Sorry, I don't know what happened!
Here's the link.
K.

Here is a link that might be useful: Mushroom Growers' Newsletter