I'm growing some out and got it from Aquaspot...It came in real bad due to the heat and I didn't use express mail, so it might make it, it might not. Currently it has all melted away but, I'm hopeful that some roots may have survived. I'll let you know.
btw if you do get some from Aquaspot it will come in straight and look a lot like E. parvula. I think it's just the emersed growth and the new submerse growth will be turned down.