We recently had the driver-side visor lose its ability to stay in position (out of the way). Read on this newsgroup that a new visor + labour is very expensive so decided that there had to be a cheap fix.
Here it is: Buy some velcro with sticky backing and stick one side on the back of the visor and the other in the proper place in the headliner where the visor should stay. Presto!
Of course it does not help with getting the visor to stay at exactly the correct angle to block the sun but we won't get much sun til spring here in Toronto anyways, so lots of time to figure that one out.
ID