I have never seen one however I do know that in the larger espresso
machines a high pressure reinforced chamber holds steam in at high
temperature to offer an effecient steaming delivery and i cant think
of how a hand held version would house such a chamber. If you come
accross one I would like to know. Maybe a personal cappacino machine
can work there are several on the market that have the steamer spout
on the side.
Mauirce