I got rental through our holiday package but noticed rental place on main Perin road near to the gondola lift (close to Happy Ending pub/bar), plus one in bottom gondola station plus (boots at least) at the top of the gondola.
I'm sure there's more.
If someone can get hold of Mr Terry Thomson perhaps he can shed some more light?
there are quiet a few some are used by the tour op and others are both and some just private hire, who ever told you there was only one either dosnt look around or hasnt been for a long time