You would be surprised the demand for 'shroom based products. And you don't need to be from the 60's, there are plenty consumers from all generations.
But I want to reiterate what Lisa posted. Since there are absolutely no laws on the books about magic mushrooms, there are no regulations whatsoever.
What is posted above about Mr and Mrs Shroom is not accurate. There are no government issued "certificate/license to grow, sell, and facilitate therapeutic mushroom trips". There are no magic mushroom certificates or licenses available at all. They do have hotel, bar, restaurant and farming licenses and certificates, but nothing magic mushroom specific, other than their business name and description. The government has no rules, guidelines or regulations on the manufacture, sales, consumption, therapeutic benefits or dosage of magic mushrooms.
Last night I tried half a chocolate bar infused with shooms, and while being very tasty, it ended up being a very expensive piece of chocolate.
So consume at your risk. There are no dosage standards or requirements. Have fun but be careful!