Lowe's sells them here, quite commonly Alice. I'm gradually replacing my screen of Clero. "Shooting Stars" with the pink/green one like Phyllis's but because I'm cheap, I wait until they go on sale and buy several at a time. Also, yes I am propagating the ones I have and you're so right, they are easy.
Maybe that's why they aren't readily available? Too easy for home growers to share.