They're by Oliso. I have the yellow one and really like it - my wrist was getting aggravated when I ironed lots of blocks, and I figured it was from tipping the iron onto its end. The Oliso has been great; I can press seams for hours now! I find that it gets hot enough.
I'm not in the US, so I don't know all the places they're available, but I have seen good prices on Amazon.