Just in case anyone is interested, here is a link to Enasco.
http://www.enasco.com/c/science/Live...rowing%20Kits/
They don't have Lion's manes, but last time I checked, this place had the least expensive Portabella kits around. That was a couple of years ago when I got one for my brother and myself. Ours both did great. Well worth the money spent!
They also have Sh*take and white mushroom kits.