Some one at AMVIV had one of these in their car and I thought it interesting enough to do a Google search for upon arriving home. Looks interesting as an repair item for those without spares or run-flats.
Yes I still have mine and yes they are rough riding... I know they will be wearing out sooner or later.
Here is a link to the company's web site, http://www.stopngo.com/automotive.asp. The automotive products look well suited to our purposes, however the motorcycle products are just as interesting, and very compact.