<<<I recently bought a 91 that has power rear view mirrors. The passenger
side mirror is broken--the mirror itself not the mechanism or the housing. Is
it possible to get a mirror replacement or will I have to change the whole
assembly?>>>

I took my van down to the local auto glass repair place and they made a
template off of the old glass, cut out a new piece of mirror with it and
glued it in the housing for $10.  My mirror was not broken.  Just the shinny
stuff had corroded away.

Tom
'71 Westy, '85 Westy, '91 Carat, '81 VW Diesel Pickup