I went to some kind of fair/livestock show thing last summer when I visited my sister in upstate NY. They had a whole huge barn full of bunnies, but for some reason not many lionheads. I actually don't remember seeing any lionheads there! That was hard for me, they where selling adorable baby bunnies for only like $5 and I was soooo tempted to take one home with me, but I didn't.
I've never seen them in pet stores around here but then again, I don't spend much time in pet stores. I actually refuse to shop in the pet stores around here, but if I'm in the area I like to stop in and look at all the animals. Don't know why, since it usually makes me sad, but still. I see tons of netherland dwarfs around here in the stores, once I saw a few dutch, but I've never seen a lionhead.